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Summary: This study proposes an efficient and facile passivation strategy by 2-amino-5-iodobenzoic acid (AIBA) for perovskite solar cells (PSCs). The strategy eliminates trap states and improves the performance and stability of the PSCs. The AIBA passivation also enhances the UV stability of perovskite films and the thermal and moisture stability of the devices.
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Chemistry, Physical
Yong Ryun Kim et al.
Summary: This study presents a method to fabricate an efficient and stable inverted perovskite solar cell (p-i-n) by using a conjugated polyelectrolyte (CzNBr) as a cathode buffer layer (CBL). The introduction of CzNBr allows modification of the work function of the metal electrode, improving charge extraction properties, and detaining migrating ionic defects in the perovskite layer induced by the metal electrode, resulting in robust stable solar cells.
JOURNAL OF MATERIALS CHEMISTRY A
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Summary: The 2D MXenes are versatile materials for photovoltaic systems, with excellent properties such as metallic conductivity, optical transmittance, solution processability, work-function tunability, and hydrophilicity. This comprehensive review focuses on the synthesis methods and properties of MXenes and their use in PV systems. The effectiveness of Ti3C2Tx, a well-known MXene, as an additive and interfacial material in different types of PV cells, as well as its influence on the stability and performance of PV cells, are systematically examined. This study provides a comprehensive understanding of MXenes and sets the direction for future development in 2D material design and processing for PVs.
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Jiankai Zhang et al.
Summary: In this work, 2D Nb2CTx MXene nanosheets were prepared and used as electron transport layer (ETL) materials in perovskite solar cells. By altering the surface groups of the MXene nanosheets, the work function was matched with the conduction band minimum of the perovskite layer, resulting in improved performance of the solar cells. Additionally, the incorporation of treated MXene nanosheets into the perovskite precursor helped in the formation of high-quality and oriented growth perovskite films, leading to higher power conversion efficiency (PCE). The flexible and large-area devices with MXene ETLs and additives achieved the highest PCE. Furthermore, the unencapsulated devices demonstrated good stability after long-term storage.
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Chen Yang et al.
Summary: We synthesized two types of MAPbI3 single-crystal films with different surface orientations, and studied their performance in solar cells. The results showed that both MAPbI3(001) and (100) single-crystal films have efficient hole transfer, but differ in electron transfer and stability.
ACS ENERGY LETTERS
(2022)
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Zhongjun Dai et al.
Summary: In this study, a PVP treatment is proposed to improve the properties of the interface and grain boundaries in perovskite solar cells. The interaction of PVP and perovskite crystals improves the crystallinity, grain boundaries, and PbI2 residues of the perovskite films, leading to an increased grain size and enhanced built-in electric field in the devices. The trap density is reduced, resulting in a significant decrease in energy loss and improved efficiency and stability of the devices.
ACS APPLIED ENERGY MATERIALS
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Jian Xiong et al.
Summary: A surface post-treatment method using N-benzyloxycarbonyl-d-valine (NBDV) is developed to improve the performance and stability of inverted perovskite solar cells (PSCs). The treatment results in bulk restructure of the perovskite film, improved film-forming property, and enhanced device performance. The treated devices achieve a high power conversion efficiency (PCE) of 21.80% and retain a significant portion of their initial PCE values after long-term storage.
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Yang Xia et al.
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NANO-MICRO LETTERS
(2022)
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Can Song et al.
Summary: This article presents an annealing-insensitive, alcohol-processed MoOx HTL that can be universally used in high-performance conventional and inverted OSCs. The MoOx HTL is spin-coated from MoOx nanoparticles dispersed in alcohol, and exhibits excellent power conversion efficiencies and ambient stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
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Yuanqing Bai et al.
Summary: The development of high-performance hole-transport materials (HTMs) is crucial for improving the efficiency and stability of perovskite solar cells. In this study, two conjugated polymers, PBTI and PFBTI, were successfully synthesized and demonstrated as promising HTMs. The introduction of fluorine atoms and optimization of the polymer structure significantly enhanced the hole mobility and stability of the devices. The PVSCs incorporating PFBTI as the HTM achieved a record power conversion efficiency of 23.1%, making it one of the best HTMs reported to date. Moreover, PFBTI showed great potential for applications in inorganic PVSCs and perovskite/organic tandem solar cells, with high conversion efficiencies of 17.4% and 22.2%, respectively.
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Qing Li et al.
Summary: Understanding the diffusion equilibrium of halide components in perovskite solar cells is crucial for addressing their instability issue. Experimental and theoretical studies have shown that halide components diffuse from perovskite to fullerene layers, affecting the efficiency of PSCs. A predoping strategy is developed to achieve halide diffusion equilibrium and ensure stable power output of PSCs.
ADVANCED ENERGY MATERIALS
(2022)
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Samina Qamar et al.
Summary: The use of perovskites has been highly successful in the photovoltaic and related industries, but there are still challenges in improving their performance and stability. The introduction of a new 2D material, halide perovskites, has significantly boosted the conversion efficiency of solar energy. The combination of halide perovskites and MXene heterostructures has shown exceptional improvements in both performance and stability of perovskite solar cells.
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Li Yin et al.
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CELL REPORTS PHYSICAL SCIENCE
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Tianqi Niu et al.
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Ping Cai et al.
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Qingxiao Zhang et al.
Summary: MXenes are widely studied as two-dimensional materials due to their properties, but dispersing MXene materials in organic solvents poses a significant challenge. The tuned microenvironment method (TMM) has been developed to prepare highly concentrated Ti3C2Tx organic solvent dispersion efficiently. The method allows for clean, uniform, and large-size Ti3C2Tx nanosheets to be dispersed in organic solvents with excellent oxidation resistance.
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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.
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Hanlin Wang et al.
Summary: MXenes are highly conductive layered materials that can be functionalized to enhance electron mobility in conjugated polymers and 2D materials, resulting in unprecedented performance and functionality for polymer transistors. Intercalant engineering represents an efficient strategy to tune the electronic properties of MXenes, leading to the fabrication of high-performance opto-electronics and energy applications.
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Chen Ke-fan et al.
Summary: MXenes are emerging 2D nanomaterials composed of transition metal carbides and/or nitrides with abundant surface functional groups. Especially, Ti3C2Tx MXene shows great potential for applications in organic/perovskite optoelectronic devices due to its advantages in synthesis, surface controlling, work function tunability, optical transmittance, and conductivity. This review introduces synthesis methods, optical and electrical properties, and versatile applications of Ti3C2Tx MXene in different functional layers of organic/perovskite optoelectronic devices, concluding with current application characteristics and future possibilities of MXenes in this field.
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Jian Xiong et al.
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Yifang Qi et al.
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Konstantinos Chatzimanolis et al.
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