Undoped Hole Transport Layer Toward Efficient and Stable Inorganic Perovskite Solar Cells

Article Chemistry, Physical

Stoichiometric Dissolution of Defective CsPbI2Br Surfaces for Inorganic Solar Cells with 17.5% Efficiency

Xinyi Liu et al.

Summary: A chemical etching strategy using ionic liquids is developed to improve the efficiency and environmental resilience of perovskite-based optoelectronic devices.

ADVANCED ENERGY MATERIALS (2022)

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Article Chemistry, Physical

Strain relaxation and domain enlargement via phase transition towards efficient CsPbI2Br solar cells

Fa-Zheng Qiu et al.

Summary: A new growth approach is developed for the deposition of CsPbI2Br films, which reduces the tensile strain and increases the domain size, resulting in CsPbI2Br films with lower defect density and better stability. The photovoltaic cells prepared using this approach achieve high efficiency and open circuit voltage, and they maintain their efficiency under relative humidity and high temperature conditions.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Multidisciplinary

Pre-Buried Additive for Cross-Layer Modification in Flexible Perovskite Solar Cells with Efficiency Exceeding 22%

Zhonghao Zheng et al.

Summary: Halide perovskites have shown great potential in flexible photovoltaics. However, the performance of flexible perovskite solar cells (F-PSCs) has been limited by interfacial stress and lattice mismatch caused by the deformation of flexible substrates. This study uses ammonium formate as an additive in the electron transport layer to modify the layers and their interface, resulting in improved electron extraction, relaxed strain, and reduced defect densities. As a result, the highest power conversion efficiency reported so far is achieved for F-PSCs.

ADVANCED MATERIALS (2022)

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Article Multidisciplinary Sciences

Organic-semiconductor-assisted dielectric screening effect for stable and efficient perovskite solar cells

Haiyang Chen et al.

Summary: This paper reports a dielectric-screening-enhancement effect for perovskite defects by using organic semiconductors with finely tuned molecular structures. The resulting perovskite films exhibit high dielectric constant values, reduced charge capture regions, suppressed ion migration, and an efficient charge transport pathway, leading to improved efficiency and stability of perovskite solar cells.

SCIENCE BULLETIN (2022)

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Article Chemistry, Multidisciplinary

Stable High-Efficiency CsPbI2Br Solar Cells by Designed Passivation Using Multifunctional 2D Perovskite

Jie Xu et al.

Summary: In CsPbI2Br perovskite solar cells, the design of glycine halides can improve performance and form a 2D/3D hybrid structure to suppress ion migration, achieving a high power conversion efficiency of 17.26%. Additionally, the efficiency of the encapsulated device only decreases by 14.1% after continuous illumination for 340 hours in ambient conditions, representing one of the most stable inorganic PSCs reported so far.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Multidisciplinary Sciences

Accelerated aging of all-inorganic, interface-stabilized perovskite solar cells

Xiaoming Zhao et al.

Summary: By incorporating a 2D capping layer, the stability of the interface in CsPbI3 PSCs can be improved, leading to an increased power conversion efficiency of all-inorganic PSCs. Accelerated aging tests can predict degradation rates and intrinsic lifetimes of PSCs at different temperatures.

SCIENCE (2022)

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Article Chemistry, Applied

Chelation of lithium ion with crown ether for eliminating adverse effects caused by Li-TFSI/tBP doping system in Spiro-OMeTAD

Zhongquan Wan et al.

Summary: This study demonstrates an effective strategy to improve the performance and stability of perovskite solar cells by replacing tBP with 12-crown-4. The strategy achieved a champion power conversion efficiency over 21% and maintained 87% of the initial efficiency after 60 days of air exposure.

JOURNAL OF ENERGY CHEMISTRY (2022)

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Article Chemistry, Multidisciplinary

Role of Moisture and Oxygen in Defect Management and Orderly Oxidation Boosting Carbon-Based CsPbI2Br Solar Cells to a New Record Efficiency

Guizhi Zhang et al.

Summary: Environmental factors such as moisture play a significant role in defect management during the re-annealing process of CsPbI2Br crystalline films. The presence of moisture reduces the oxidation kinetics and enables orderly oxidation, leading to improved photovoltaic performance in CsPbI2Br C-PSCs. The champion cell achieved a record efficiency of 15.27% in this study, highlighting the importance of defect management in enhancing the performance of carbon-based perovskite solar cells.

ADVANCED MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Molecular Self-Assembly Regulated Dopant-Free Hole Transport Materials for Efficient and Stable n-i-p Perovskite Solar Cells and Scalable Modules

Qinrong Cheng et al.

Summary: Researchers propose a molecular assembly strategy to improve the optoelectronic properties of organic hole transport materials (HTMs) in perovskite solar cells. The resulting cells show promising efficiency and long-term stability.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Engineering, Environmental

Interfacial engineering strategy based on polymer modification to regulate the residual stress in CsPbI2Br based perovskite solar cells

Kanghui Zheng et al.

Summary: In this study, an organic polymer J71 was utilized to release the internal stress in inorganic perovskite film. It was found that the coordination between J71 and perovskite effectively regulated the strain, achieving a strain-free film at an optimal J71 concentration. The covalent bond between J71 and perovskite induced secondary crystal growth, resulting in refined film morphology. Additionally, J71 served as a hydrophobic barrier, preventing moisture-induced lattice distortion. With the treatment of J71, the CsPbI2Br-based PSCs achieved an excellent PCE of 16.15% and demonstrated outstanding stability under different environments.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Chemistry, Multidisciplinary

A low-cost hole transport layer enables CsPbI2Br single-junction and tandem perovskite solar cells with record efficiencies of 17.8 % and 21.4 %

Yuanjia Ding et al.

Summary: Among inorganic perovskites, CsPbI2Br shows great potential for single-junction perovskite solar cells (PSCs) and perovskite/organic tandem solar cells (TSCs) due to its intrinsic thermal stability, suitable bandgap, and superior phase-stability. This study demonstrates that using PTQ10 as a hole transport layer (HTL) for PSCs and an inter-connecting layer (ICL) for TSCs can significantly improve the power conversion efficiencies (PCEs) of CsPbI2Br-based devices. The PTQ10 HTL exhibits better energy level matching with CsPbI2Br and can passivate the perovskite surface, leading to enhanced performance in both PSCs and TSCs.

NANO TODAY (2022)

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Article Nanoscience & Nanotechnology

Overcoming Perovskite Corrosion and De-Doping Through Chemical Binding of Halogen Bonds Toward Efficient and Stable Perovskite Solar Cells

Guanhua Ren et al.

Summary: By utilizing halogen bonds to bond with TBP, the decomposition of perovskites and the de-doping effect of spiro-OMeTAD can be prevented, leading to improved stability of perovskite solar cells.

NANO-MICRO LETTERS (2022)

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Article Chemistry, Physical

Quantifying the Energy Losses in CsPbI2Br Perovskite Solar Cells with an Open-Circuit Voltage of up to 1.45 V

Jingjing Tian et al.

Summary: CsPbI2Br perovskite solar cells show potential as a top cell for tandem applications, but the open-circuit voltage (V-OC) reported so far is usually below the detailed balance (DB) limit for single-junction PSCs. By adding lead acetate to the CsPbI2Br precursor, losses due to nonradiative recombination can be significantly reduced, leading to improved power conversion efficiency and higher V-OC values.

ACS ENERGY LETTERS (2022)

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Review Chemistry, Multidisciplinary

Strain effects on halide perovskite solar cells

Bowen Yang et al.

Summary: This article reviews the influence of strain on the performance and stability of halide perovskite solar cells, covering the origins, characterization techniques, and control strategies of strain. It also proposes effective strategies for future strain engineering. The comprehensive review is important for researchers to gain a deeper understanding of strain effects and improve performance towards commercialization.

CHEMICAL SOCIETY REVIEWS (2022)

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Article Materials Science, Multidisciplinary

Inhibiting octahedral tilting for stable CsPbI2Br solar cells

Aili Wang et al.

Summary: The intrinsic phase instability of CsPbI2Br perovskite in solar cells is addressed using BMIMPF6 as an additive to improve phase stability. The study shows that the addition of BMIMPF6 reduces the formation energy of CsPbI2Br, resulting in improved structural stability and charge transfer efficiency. CsPbI2Br solar cells with BMIMPF6 exhibit a PCE of 16.2% and excellent stability under various storage and thermal conditions.

INFOMAT (2022)

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Article Nanoscience & Nanotechnology

A Universal Dopant-Free Polymeric Hole-Transporting Material for Efficient and Stable All-Inorganic and Organic-Inorganic Perovskite Solar Cells

Xiaohui Liu et al.

Summary: PM6 as a dopant-free hole-transporting material shows remarkable performance enhancements in CsPbI2Br PSCs, including higher power conversion efficiency and improved stability, and also exhibits good performance in organic-inorganic hybrid PSCs.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Chemistry, Physical

Acetone-assisted precursor engineering enables low-temperature fabrication of CsPbI2Br perovskite for efficient solar cells

Weijian Tang et al.

Summary: By introducing acetone as a co-solvent in the precursor, this study successfully achieved the low-temperature fabrication of alpha-phase CsPbI2Br perovskite, resulting in improved wettability and reduced crystallization activation energy. The acetone-assisted CsPbI2Br device demonstrated superior efficiency and stability, approaching the highest reported efficiency for CsPbI2Br solar cells.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Multidisciplinary

Synergistic Effect of Fluorinated Passivator and Hole Transport Dopant Enables Stable Perovskite Solar Cells with an Efficiency Near 24%

Hongwei Zhu et al.

Summary: The study introduces a trifluoromethylation strategy using TFMBAI and TFP as additives to improve the PCE and moisture resistance of PSCs. By surface treating the perovskite with TFMBAI and adding TFP to the HTL, the PSCs achieved a higher efficiency and improved durability against moisture attack.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Dopant-Free Polymer HTM-Based CsPbI2Br Solar Cells with Efficiency Over 17% in Sunlight and 34% in Indoor Light

Zhanglin Guo et al.

Summary: A new polymer, PDTDT, has been developed as a dopant-free hole-transporting material for CsPbI2Br solar cells, which shows high efficiency and stability, making it a potential alternative to popular doped Spiro-OMeTAD and P3HT HTM.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Electrical Loss Management by Molecularly Manipulating Dopant-free Poly(3-hexylthiophene) towards 16.93 % CsPbI2Br Solar Cells

Ming-Hua Li et al.

Summary: By manipulating the interaction between the polymer and small molecule, a strategy for managing electrical losses in inorganic cesium lead halide perovskite solar cells was developed, significantly increasing carrier mobility and reducing surface defect density, while also improving stability.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

PMMA passivated CsPbI2Br perovskite film for highly efficient and stable solar cells

Beilei Yuan et al.

Summary: By treating CsPbI2Br films with PMMA coating, defects can effectively be passivated, charge recombination can be suppressed, and electron extraction efficiency can be increased, leading to improved performance of solar cells.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS (2021)

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Article Chemistry, Physical

Composition engineering of operationally stable CsPbI2Br perovskite solar cells with a record efficiency over 17%

Teoman Ozturk et al.

Summary: The study presents a method of tuning CsPbI2Br crystallization by incorporating FeCl2 into the perovskite precursor. The introduction of FeCl2 stabilizes the crystal phase, improves efficiency and stability of the photovoltaic devices.

NANO ENERGY (2021)

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Article Chemistry, Multidisciplinary

Enhanced Efficiency and Stability of All-Inorganic CsPbI2Br Perovskite Solar Cells by Organic and Ionic Mixed Passivation

Jian He et al.

Summary: The study investigates the effects of mixed passivation on all-inorganic perovskite (CsPbI2Br) solar cells for the first time, resulting in improved film quality and energy level alignment. The passivation enhances hole extraction, drives interface electron separation, suppresses charge recombination, and achieves a high open-circuit voltage and fill factor in the devices. Moreover, the treated devices exhibit remarkable long-term stability with minimal efficiency loss after storage in a glove box for over 1000 hours without encapsulation.

ADVANCED SCIENCE (2021)

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Article Chemistry, Physical

Synergetic effects of electrochemical oxidation of Spiro-OMeTAD and Li+ ion migration for improving the performance of n-i-p type perovskite solar cells

Changzeng Ding et al.

Summary: This study demonstrates the oxidation mechanism of Spiro-OMeTAD in perovskite solar cells using various analysis methods, and confirms the involvement of Li+ migration in the oxidation process.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Nanoscience & Nanotechnology

Insights into the Mechanism of Solid-State Metal Organic Complexes as Controllable and Stable p-Type Dopants in Efficient Planar Perovskite Solar Cells

Lele Qiu et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Nanoscience & Nanotechnology

Solvent Engineering of a Dopant-Free Spiro-OMeTAD Hole-Transport Layer for Centimeter-Scale Perovskite Solar Cells with High Efficiency and Thermal Stability

Min Hu et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Multidisciplinary

Controlled n-Doping in Air-Stable CsPbI2Br Perovskite Solar Cells with a Record Efficiency of 16.79%

Yu Han et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Article Chemistry, Physical

1000 h Operational Lifetime Perovskite Solar Cells by Ambient Melting Encapsulation

Sai Ma et al.

ADVANCED ENERGY MATERIALS (2020)

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Article Nanoscience & Nanotechnology

Composite Encapsulation Enabled Superior Comprehensive Stability of Perovskite Solar Cells

Yifan Lv et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Physical

Hermetic seal for perovskite solar cells: An improved plasma enhanced atomic layer deposition encapsulation

Haoran Wang et al.

NANO ENERGY (2020)

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Article Multidisciplinary Sciences

Regulating strain in perovskite thin films through charge-transport layers

Ding-Jiang Xue et al.

NATURE COMMUNICATIONS (2020)

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Article Nanoscience & Nanotechnology

Oxidization-Free Spiro-OMeTAD Hole-Transporting Layer for Efficient CsPbI2Br Perovskite Solar Cells

Zhu Ma et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Physical

2D Cs2PbI2Cl2 Nanosheets for Holistic Passivation of Inorganic CsPbI2Br Perovskite Solar Cells for Improved Efficiency and Stability

Shaomin Yang et al.

ADVANCED ENERGY MATERIALS (2020)

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Article Multidisciplinary Sciences

Strain engineering in perovskite solar cells and its impacts on carrier dynamics

Cheng Zhu et al.

NATURE COMMUNICATIONS (2019)

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Article Chemistry, Multidisciplinary

Dual Interfacial Design for Efficient CsPbI2Br Perovskite Solar Cells with Improved Photostability

Jingjing Tian et al.

ADVANCED MATERIALS (2019)

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Article Chemistry, Multidisciplinary

Evidence of Spiro-OMeTAD De-doping by tert-Butylpyridine Additive in Hole-Transporting Layers for Perovskite Solar Cells

Francesco Lamberti et al.

CHEM (2019)

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Article Chemistry, Physical

LiTFSI-Free Spiro-OMeTAD-Based Perovskite Solar Cells with Power Conversion Efficiencies Exceeding 19%

Boer Tan et al.

ADVANCED ENERGY MATERIALS (2019)

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Article Chemistry, Physical

Interface engineering of low temperature processed all-inorganic CsPbI2Br perovskite solar cells toward PCE exceeding 14%

Long Zhou et al.

NANO ENERGY (2019)

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Article Chemistry, Physical

A Novel Anion Doping for Stable CsPbI2Br Perovskite Solar Cells with an Efficiency of 15.56% and an Open Circuit Voltage of 1.30 V

Huan Zhao et al.

ADVANCED ENERGY MATERIALS (2019)

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Article Chemistry, Multidisciplinary

Dopant-Free Squaraine-Based Polymeric Hole-Transporting Materials with Comprehensive Passivation Effects for Efficient All-Inorganic Perovskite Solar Cells

Qi Xiao et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

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Article Chemistry, Multidisciplinary

Self-Assembly of Hybrid Oxidant POM@Cu-BTC for Enhanced Efficiency and Long-Term Stability of Perovskite Solar Cells

Yayu Dong et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

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Article Chemistry, Physical

Inverted All-Inorganic CsPbI2Br Perovskite Solar Cells with Promoted Efficiency and Stability by Nickel Incorporation

Lijun Chen et al.

CHEMISTRY OF MATERIALS (2019)

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Article Chemistry, Physical

Excess Cesium Iodide Induces Spinodal Decomposition of CsPbI2Br Perovskite Films

Xiangyue Meng et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2019)

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Article Chemistry, Physical

Precise Control of Crystal Growth for Highly Efficient CsPbI2Br Perovskite Solar Cells

Weijie Chen et al.

JOULE (2019)

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Article Chemistry, Multidisciplinary

Band engineering at the interface of all-inorganic CsPbI2Br solar cells

Jing Zhuang et al.

NANOSCALE (2019)

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Guanidinium doping enabled low-temperature fabrication of high-efficiency all-inorganic CsPbI2Br perovskite solar cells

Junjie Ma et al.

JOURNAL OF MATERIALS CHEMISTRY A (2019)

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Article Chemistry, Multidisciplinary

Interface Engineering for All-Inorganic CsPbI2Br Perovskite Solar Cells with Efficiency over 14%

Lei Yan et al.

ADVANCED MATERIALS (2018)

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Article Materials Science, Multidisciplinary

Pyridination of hole transporting material in perovskite solar cells questions the long-term stability

Artiom Magomedov et al.

JOURNAL OF MATERIALS CHEMISTRY C (2018)

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Article Chemistry, Multidisciplinary

Li dopant induces moisture sensitive phase degradation of an all-inorganic CsPbI2Br perovskite

Yihui Li et al.

CHEMICAL COMMUNICATIONS (2018)

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Article Chemistry, Multidisciplinary

Low Temperature Fabrication for High Performance Flexible CsPbI2Br Perovskite Solar Cells

Hong Jiang et al.

ADVANCED SCIENCE (2018)

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Article Energy & Fuels

A Facile Low Temperature Fabrication of High Performance CsPbI2Br All-Inorganic Perovskite Solar Cells

Yong Wang et al.

SOLAR RRL (2018)

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Strained hybrid perovskite thin films and their impact on the intrinsic stability of perovskite solar cells

Jingjing Zhao et al.

SCIENCE ADVANCES (2017)

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Fluorinated Copolymer PCPDTBT with Enhanced Open-Circuit Voltage and Reduced Recombination for Highly Efficient Polymer Solar Cells

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2012)

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Device optimization in PCPDTBT:PCBM plastic solar cells

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SOLAR ENERGY MATERIALS AND SOLAR CELLS (2010)

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Bipolar charge transport in PCPDTBT-PCBM bulk-heterojunctions for photovoltaic applications

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ADVANCED FUNCTIONAL MATERIALS (2008)

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Undoped Hole Transport Layer Toward Efficient and Stable Inorganic Perovskite Solar Cells

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