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Article
Materials Science, Multidisciplinary
Weixian Chen et al.
Summary: Interfacial defects result in serious carrier nonradiative recombination. A strategy for controlling spatial conformation of modification molecules is reported to effectively regulate interfacial carrier dynamics and defect passivation. Two similar Lewis base ligand molecules, biuret (BU) and dithiobiuret (DTBU), are employed to modify the surface of perovskite films. BU and DTBU can effectively passivate interfacial defects but BU is more effective due to higher electronegativity and more advantageous molecular spatial arrangement. The power conversion efficiency is significantly enhanced from 21.66% to 23.54% after BU modification along with improved stability.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Applied
Dongmei He et al.
Summary: By investigating the defect repair mechanism of ionic liquids in perovskite solar cells, it was found that an abnormal buried interface defect passivation mechanism is induced by cation-induced steric hindrance. The results reveal that interfacial defect passivation relies on anions rather than cations. The study also demonstrates that large-sized cations can weaken the ionic bond strength between anions and cations, promoting the interaction between anions and SnO2 and perovskites, leading to improved defect passivation and interfacial contact.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Energy & Fuels
Jialing Liu et al.
Summary: In this study, L- and D-cysteine were introduced into carbon-based fully printable mesoscopic perovskite solar cells as additives, achieving power conversion efficiencies of 17.41% and 15.12% respectively. Density functional theory (DFT) was used to explore the reasons for the differences in photoelectric conversion performance, including enhanced negative surface electrostatic potential, inhibition of nonradiative recombination, improved perovskite crystallization, stability, and light capture.
Article
Chemistry, Multidisciplinary
Chang Liu et al.
Summary: In this study, a novel multifunctional organic salt, metformin hydrochloride, is introduced on both the top and buried surfaces of the perovskite layer in order to suppress defects and improve mechanical stability. The power conversion efficiency (PCE) of the rigid perovskite solar cells reaches 24.40%, while the PCE of the flexible perovskite solar cells reaches 22.04%. The devices show excellent operational stability, retaining 90% and 80% of their initial efficiency after 1000 hours of light illumination and 10,000 bending cycles, respectively. This research provides a global way to design a passivation strategy and fabricate flexible perovskite solar cells with high efficiency and stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hang Su et al.
Summary: Based on theoretical calculations, it is found that enhancing the electrostatic potential of passivators can improve the passivation effect and adsorption energy between charged defects and passivators. Therefore, an electrostatic potential modulation (EPM) strategy is developed to design passivators for highly efficient and stable perovskite solar cells (PSCs). Through experiments, two designed passivators show good passivation effects, and the EPM strategy provides a principle for passivator design and allows passivation to be controllable, which may advance the optimization and commercialization of perovskite solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhuowei Li et al.
Summary: To commercialize CsPbI2Br-based perovskite solar cells (PSCs), stability issues induced by the hygroscopic nature of spiro-OMeTAD and residual strain of the perovskite layer need to be addressed. This study shows that by using PCPDTBT as a p-type semiconductor, the issues of hole transport and strain regulation can be overcome. The CsPbI2Br-based PSCs with PCPDTBT layer achieved an improved efficiency of 16.5% and enhanced stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kai-Li Wang et al.
Summary: Amino naphthalene sulfonates polar molecules are used to functionalize the TiO2 substrate, with strong ion-dipole interaction between molecules and the ionic perovskite film, resulting in high-quality CsPbI3 films. These films exhibit defect-immunity and large shunt resistance under low light conditions, enabling high-efficiency indoor photovoltaic devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lisha Xie et al.
Summary: In this work, a deformable coumarin is used as a multifunctional additive for formamidinium-cesium (FA-Cs) perovskite solar cells. Coumarin passivates defects and affects colloidal size distributions, leading to improved carrier extraction and reduced trap-assisted recombination. Coumarin treatment also releases residual stress, improving the performance of flexible perovskite solar cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jidong Deng et al.
Summary: A versatile strategy of pre-grafted halides is proposed to strengthen the SnO2-perovskite buried interface, resulting in improved efficiency and stability of perovskite solar cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jinpeng Wu et al.
Summary: Passivation of defects in perovskite solar cells using organic halide salts, particularly chlorides, is an effective method for improving power conversion efficiencies. However, the incorporation of chloride ions into the perovskite lattice can degrade the photovoltaic performance. In this study, we replace ionic chloride salts with atomic-Cl-containing organic molecules, which both retain efficient passivation and prevent chloride incorporation. By optimizing the molecular configuration, the resulting perovskite solar cells achieve a certified power conversion efficiency of 25.02% and maintain 90% of their initial efficiency after 500 hours of continuous operation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Zaiwei Wang et al.
Summary: Researchers have discovered that lattice distortion in iodide/bromide mixed perovskites can suppress phase segregation, leading to increased ion-migration energy barrier. By using an approximately 2.0-electron-volt rubidium/caesium mixed-cation inorganic perovskite with large lattice distortion, they achieved an efficiency of 24.3% in all-perovskite triple-junction solar cells. This is the first reported certified efficiency for perovskite-based triple-junction solar cells.
Article
Multidisciplinary Sciences
Jaewang Park et al.
Summary: Controlling the crystallinity and surface morphology of perovskite layers is crucial for achieving high-efficiency perovskite solar cells. By adding alkylammonium chlorides (RACl) to a-formamidinium lead iodide (FAPbI(3)), the crystallization process and surface morphology of the perovskite thin films can be controlled. The resulting perovskite thin layers facilitate the fabrication of perovskite solar cells with a high power-conversion efficiency of 26.08%.
Article
Multidisciplinary Sciences
Chengbin Fei et al.
Summary: The incorporation of lead chelation molecules into hole-transport layers (HTLs) improves the bottom interfaces of perovskite solar cells, leading to enhanced performance. The addition of these molecules reduces the amorphous region and passivates the perovskite surface near the HTLs. The resulting minimodule achieves a certified power conversion efficiency (PCE) of 21.8% (stabilized at 21.1%) and a minimal small-cell efficiency of 24.6% (stabilized at 24.1%) throughout the module area.
Article
Multidisciplinary Sciences
Shuo Zhang et al.
Summary: In this study, an amphiphilic molecular hole transporter with a multifunctional cyanovinyl phosphonic acid group was used to deposit a superwetting underlayer for perovskite deposition. This enabled the formation of high-quality perovskite films with minimized defects at the buried interface. The resulting perovskite film showed excellent photoluminescence properties and achieved a certified PCE of 25.4%, demonstrating its potential for application in solar cells.
Article
Chemistry, Physical
Tengteng Yang et al.
Summary: By designing polar molecules with permanent dipole moments, the surface termination of organic-inorganic hybrid perovskite materials can be modified. The proper interfacial design significantly reduces trap state density, allowing for effective charge transfer. The energy level of the substrate can be adjusted by the magnitude and direction of the dipole moment. As a result, introducing pentafluoride benzene moieties with carboxylic functional groups achieves a high photo-electric conversion efficiency of 24.54% and improves the humidity and heat stability of the perovskite device. This work demonstrates the importance of chemical interactions at perovskite termination and paves the way for further enhancing the performance of perovskite solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jingwei Xiu et al.
Summary: In order to address the toxicity concern of extensively used chlorobenzene and toluene antisolvents, a general and highly reproducible methodology of employing CsPbI3 nanocrystals functionalized green alkanes with ultralow-polarity as antisolvents to fabricate high-quality perovskite films is reported in this work. This approach provides perovskite films with improved quality, high-orientation, and suppressed phase segregation, leading to enhanced stability and conversion efficiency compared to the traditional chlorobenzene processing.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jungang Wang et al.
Summary: It is found that using a compound called DED can effectively reduce defects in CsPbI3 films and suppress ion migration, thereby improving the performance and stability of perovskite solar cells. Experimental results show that CsPbI3 cells treated with DED exhibit excellent performance, with a champion PCE of 21.15%.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Jidong Deng et al.
Summary: The inorganic semiconductor CsBi3I10 (CBI) shows potential as a lead-based light harvesting material alternative. However, poor film quality and high defects limit its photovoltaic performance in solar cell applications. In this study, the addition of lead thiocyanate (Pb(SCN)2) effectively improves film morphology and optoelectronic properties of CBI, resulting in high-quality thin films with desirable properties. The resulting solar cells exhibit significantly enhanced performance, with a record efficiency of 1.13%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Zuxiong Xu et al.
Summary: Surface modification improves the defect passivation and energy level alignment of CsPbI3 perovskite films, resulting in increased efficiency and stability of perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Santhanamoorthi Nachimuthu et al.
Summary: A study is conducted to investigate the role of different surface terminations on the degradation of CH3NH3PbI3 (MAPbI(3)) perovskite under simultaneous exposure to water and oxygen in the presence of light. It is found that photogenerated electrons increase the interaction between H2O and O-2 molecules and degrade the perovskite surface faster when H2O and O-2 molecules coexist. AIMD simulations also show that the PbI2-terminated surface undergoes significant structural degradation, while the MAI-terminated surface remains stable. Furthermore, MAPbI(3)-based perovskite solar cells treated with a specific concentration of MAI precursor exhibit improved photovoltaic performance and stability.
MATERIALS TODAY ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Haichao Yang et al.
Summary: In this study, a bottom-up bilateral modification strategy was proposed to optimize the performance of perovskite solar cells. By incorporating arsenazo III (AA) into SnO2 nanoparticles, defects in the electron transport layer, perovskite, and buried interface could be regulated, resulting in improved stability and energy conversion efficiency of the devices.
Article
Chemistry, Multidisciplinary
Lisha Xie et al.
Summary: In this study, a deformable coumarin is used as an additive to improve the performance and stability of perovskite solar cells. The coumarin can passivate defects in perovskite and affect the particle size distribution, resulting in improved crystallinity of the perovskite film. Additionally, the coumarin treatment can release residual stress. As a result, the champion power conversion efficiencies of 23.18% and 24.14% are obtained for Br-rich and Br-poor based devices, respectively. Furthermore, the flexible PSCs based on Br-poor perovskite exhibit an excellent PCE of 23.13% and show good thermal and light stability.
ADVANCED MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Wenguang Liu et al.
Summary: In this review, important research progress on the 'golden triangle' parameters of efficiency, stability, and cost in perovskite solar cells (PSCs) was objectively analyzed. Key bottlenecks and contradictions hindering their fast commercialization were identified, and urgent directions requiring intensive research and development input were proposed to speed up the commercialization process of PSCs.
Article
Multidisciplinary Sciences
Minjin Kim et al.
Summary: The study replaced the commonly used mesoporous titanium dioxide electron transport layer with a thin layer of polyacrylic acid-stabilized tin(IV) oxide quantum dots, which improved the efficiency and stability of perovskite solar cells and enabled successful scaling up of PSCs production.
Article
Chemistry, Physical
Jidong Deng et al.
Summary: Lead contamination and instability of Pb-based perovskite materials limit their application, and there is a need for efficient and stable Pb-free alternatives. CsBi3I10 shows promise as a light absorber, but low-quality films and poor conversion efficiencies hinder its practical use. This study develops a fabrication technology and introduces a molecular additive to enhance the performance of CsBi3I10 thin film solar cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
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)
Article
Chemistry, Physical
Zhihao Li et al.
Summary: This article proposes a new method for the deposition of SnO2 electron transport layers (ETLs) at room temperature, which is suitable for the fabrication of flexible solar cells. The experiments show that SnO2 films treated with amine gases are smoother and more compact compared to those treated with thermal annealing. A base-catalyzed densification mechanism is proposed to explain the experimental results. The flexible solar cells with the annealing-free SnO2 ETLs achieve high power conversion efficiencies and excellent flexibility.
Article
Chemistry, Physical
Kun Wei et al.
Summary: In this work, a general route to modify the interfaces of electron conductor in perovskite solar cells (PSCs) is proposed, resulting in improved structural uniformity, enhanced charge collection, and suppressed carrier recombination. The efficiency of PSCs is increased from 20.0% to 23.01%, accompanied by a significant open-circuit voltage and low energy losses. Furthermore, the interfacial configuration enables long-term stability and mechanical durability of the devices.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Zhengjie Zhu et al.
Summary: By studying the different configurations and protonation states of amine groups in the PEI family, we discovered an in-situ protonation process that significantly reduces deep-level traps of minority carriers in p-i-n perovskite solar cells. This method can improve the power conversion efficiency of solar cells, and the cells showed no degradation in long-term testing.
Article
Chemistry, Multidisciplinary
Jidong Deng et al.
Summary: Interface engineering plays a crucial role in optimizing the performance and stability of perovskite solar cells (PSCs). This study introduces a molecular bridge strategy using a multi-functional additive, ChCl, to modify the properties of buried interfaces in PSCs, leading to enhanced electron extraction and improved stability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Jiankai Zhang et al.
Summary: In this work, the formation of a p/p(+) homojunction and interface electric field on the surfaces of perovskite films is shown to reduce nonradiative recombination losses and V-oc loss, leading to improved performance of perovskite solar cells.
ADVANCED ENERGY MATERIALS
(2022)
Article
Multidisciplinary Sciences
Hanul Min et al.
Summary: By introducing an interlayer between the electron-transporting and perovskite layers in perovskite solar cells, researchers have successfully enhanced charge extraction and transport from the perovskite, leading to higher power conversion efficiency and fewer interfacial defects. The coherent interlayer allowed the fabrication of devices with a certified efficiency of 25.5%, which maintained about 90% of its initial efficiency even after continuous light exposure for 500 hours. The findings provide guidelines for designing defect-minimizing interfaces in metal halide perovskites and electron-transporting layers.
Article
Chemistry, Physical
Sheng Fu et al.
Summary: Humidity-assisted chlorination with solid protection via Si-Cl incorporation is effective for reducing moisture erosion during deposition of CsPbI3 perovskite solar cells in air. The solid protection from Si-OH helps improve the crystallization and phase stability of CsPbI3, resulting in high efficiency and moisture tolerance.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Baibai Liu et al.
Summary: The modification of perovskite films with the multi-active-site Lewis base ligand MTDAA effectively reduces defect density, increases carrier lifetime, and almost completely releases interfacial residual stress. The PCE is boosted after MTDAA modification, and the devices maintain high stability after aging tests.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Erkan Aydin et al.
Summary: By developing new contact materials, the research team successfully converted high-efficiency single-junction perovskite solar cells into efficient perovskite/silicon tandem solar cells, achieving a conversion efficiency of up to 27%.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yuqian Yang et al.
ADVANCED MATERIALS
(2020)
Article
Chemistry, Physical
Shengfan Wu et al.
Article
Chemistry, Multidisciplinary
Guangbo Chen et al.
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
Article
Chemistry, Physical
Tianhao Wu et al.
ADVANCED ENERGY MATERIALS
(2019)
Article
Multidisciplinary Sciences
Wu-Qiang Wu et al.
Article
Chemistry, Multidisciplinary
Jingjing Tian et al.
ADVANCED MATERIALS
(2019)
Article
Multidisciplinary Sciences
Rui Wang et al.
Article
Chemistry, Physical
Rui Wang et al.
Article
Chemistry, Multidisciplinary
Zhifang Wu et al.
ADVANCED MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Ying Zhang et al.
JOURNAL OF MATERIALS CHEMISTRY C
(2017)
Article
Chemistry, Multidisciplinary
Antonio Abate et al.
Article
Optics
Arianna Marchioro et al.
