Article
Chemistry, Multidisciplinary
Qiaoyu Zhang, Jialong Duan, Qiyao Guo, Junshuai Zhang, Dengduan Zheng, Fangxuan Yi, Xiya Yang, Yanyan Duan, Qunwei Tang
Summary: This study improves the efficiency and stability of perovskite solar cells by using a thermal-triggered self-healing polyurethane. The self-healing property of the polyurethane helps repair defects in the perovskite film, leading to higher efficiency and longer-term stability. The photovoltaic performance of the device can be recovered through simple heat treatment.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Sandeep Kajal, Jaeki Jeong, Jongdeuk Seo, Rohit Anand, YeonJu Kim, Bangaru Bhaskararao, Chan Beom Park, Jiwoo Yeop, Anders Hagdfeldt, Jin Young Kim, Kwang S. Kim
Summary: Despite the recent increase in efficiency, perovskite solar cells (PSCs) still suffer from surface defects and ion migration, affecting their stability. In this study, we synthesized new materials with high binding energy and investigated their effects on defect passivation, ion migration, and device stability. The passivation treatment significantly improved the power conversion efficiency of PSCs, reduced hysteresis, and enhanced long-term stability, even without encapsulation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yao Fu, Huifang Han, Huijing Liu, Jia Xu, Yang Liu, Ruifeng Shi, Jianxi Yao
Summary: In this study, the surface of all-inorganic CsPbI3 perovskites is converted into water-insoluble lead(ii) chromate, which significantly improves the efficiency and stability of perovskite solar cell devices. The lead chromate passivation layer formed on the surface effectively reduces defect density and enhances water resistance. The lead chromate-passivated devices show enhanced heat stability and improved efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Hao Zhang, Qingwen Tian, Wanchun Xiang, Yachao Du, Zhiteng Wang, Yali Liu, Lidan Liu, Tengteng Yang, Haifeng Wu, Ting Nie, Wenliang Huang, Adel Najar, Shengzhong (Frank) Liu
Summary: The main culprits causing poor stability and non-radiative charge recombination in inorganic perovskite solar cells (PSCs) are identified on the surface of the perovskite material. A new passivator, BMBC, is designed to suppress halide vacancies and coordinate with undercoordinated Pb2+ through Lewis base-acid reactions. This passivation method reduces surface trap density, increases grain size, prolongs charge lifetime, and achieves more suitable energy-level alignment, resulting in increased efficiency and improved stability of the PSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhiteng Wang, Qingwen Tian, Hao Zhang, Huidong Xie, Yachao Du, Lei Liu, Xiaolong Feng, Adel Najar, Xiaodong Ren, Shengzhong (Frank) Liu
Summary: Research has found that halide-related surface defects on inorganic halide perovskite can lead to charge recombination and affect the long-term stability of perovskite solar cells. Using density functional theory calculation, it has been verified that iodine interstitials (I-i) have a low formation energy and are easily formed on the surface of all-inorganic perovskite. A specific passivator called 2,6-diaminopyridine (2,6-DAPy) has been screened, which successfully eliminates iodine interstitials, dissociative iodine molecules, and passivates iodine vacancies. This passivation process improves the power-conversion efficiency (PCE) and environmental stability of the perovskite solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Yali Liu, Wanchun Xiang, Shaiqiang Mou, Hao Zhang, Shengzhong Liu
Summary: Passivating ionic defects on the surface of inorganic perovskite films using DADA significantly reduces defect density and extends the lifetime of charge carriers within the film. Additionally, DADA treatment induces an upward shift of the energy band edge of the perovskite layer, potentially facilitating hole extraction at the interface.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Songyang Yuan, Wenwen Wu, Mengqi Wang, Yeming Xian, Wenzhe Li, Jiandong Fan
Summary: This study demonstrates the use of multidimensional coupling strategy with picolylamine isomers to stabilize CsPbIxBr3-x inorganic perovskite materials and improve their power conversion efficiency. The functional A-site organic group is shown to effectively passivate iodine vacancy defects, enhancing the long-term stability of the material. The optimized CsPbI2.85Br0.15 perovskite solar cells achieved high efficiency under high light intensity and remained highly efficient even after prolonged aging in humid conditions, surpassing their 3D counterparts.
Article
Chemistry, Physical
Shuang Li, Junming Qiu, Rongshan Zhuang, Qisen Zhou, Mingxu Zhang, Mubing Yu, Yong Hua, Xiaoliang Zhang
Summary: In this study, chloride additives were used to improve the crystallization of CsPbI3 perovskite films, resulting in highly oriented crystals and suppressed nonradiative recombination. This led to the development of an efficient inorganic perovskite solar cell with a high efficiency of 18.62% and good stability.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Xin Wang, Yuan Xu, Huayan Zhang, Zhongliang Yan, Yu Jing, Xiao Liu, Jihuai Wu, Zhang Lan
Summary: By introducing multifunctional aminoguanidine hemisulfate into the CsPbIBr2 perovskite layer, defects were successfully passivated, leading to a high energy conversion efficiency. Using all-inorganic CsPbIBr2 perovskite solar cells can significantly reduce costs, providing a new direction for development in this field.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Energy & Fuels
Jingya Fan, Yajie Yang, Ting Jiang, Jingquan Zhang, Lili Wu, Wenwu Wang, Guanggen Zeng, Jianqin Li, Mohammad Abdul Halim, Xia Hao
Summary: This study introduces propylammonium chloride (PACL) for interface treatment of perovskite solar cells, leading to improved performance in terms of power conversion efficiency and mechanical stability.
Review
Chemistry, Multidisciplinary
Yutian Lei, Youkui Xu, Meng Wang, Ge Zhu, Zhiwen Jin
Summary: Defects are considered to be one of the most significant factors affecting the power conversion efficiency and long-term stability of perovskite solar cells. Various methods to reduce defect density and improve device performance and long-term stability are introduced, including additive engineering, surface passivation, and other physical treatments. Further understanding of defects and the development trends of passivation strategies are also discussed.
Article
Multidisciplinary Sciences
Cheng Liu, Yi Yang, Kasparas Rakstys, Arup Mahata, Marius Franckevicius, Edoardo Mosconi, Raminta Skackauskaite, Bin Ding, Keith G. Brooks, Onovbaramwen Jennifer Usiobo, Jean-Nicolas Audinot, Hiroyuki Kanda, Simonas Driukas, Gabriele Kavaliauskaite, Vidmantas Gulbinas, Marc Dessimoz, Vytautas Getautis, Filippo De Angelis, Yong Ding, Songyuan Dai, Paul J. Dyson, Mohammad Khaja Nazeeruddin
Summary: The study focuses on understanding the energy barrier of 2D perovskite formation and proposes a method to prevent the formation of in-plane favored 2D perovskite layers, leading to improved device performance.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Xiaoming Zhao, Tianran Liu, Quinn C. Burlingame, Tianjun Liu, Rudolph Holley, Guangming Cheng, Nan Yao, Feng Gao, Yueh-Lin Loo
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.
Article
Energy & Fuels
Yinyan Xu, Qian Wang, Lun Zhang, Mei Lyu, Hongbo Lu, Tianxin Bai, Feng Liu, Mingkui Wang, Jun Zhu
Summary: Surface passivation of CsPbIBr2 inorganic perovskite layers with Sr-doped CsPbI3 quantum dots is reported to reduce interfacial recombination and enhance hole extraction. The enhanced photoluminescence quantum yield and carrier lifetime result in highly efficient perovskite solar cells with improved open circuit voltage, showing promise for improving device performance in inorganic perovskite solar cells.
Article
Chemistry, Physical
Wei He, Xiya Yang, Jialong Duan, Junshuai Zhang, Qiyao Guo, Hao Huang, Qunwei Tang
Summary: The proposed liquid buried interface (LBI) overcomes the problem of residual tensile strain in halide perovskite solar cells (PSC) by introducing a low melting-point small molecule to replace the traditional solid-solid interface, leading to improved power conversion efficiency (PCE) and stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Chemistry, Physical
Shaomin Yang, Yuwei Duan, Zhike Liu, Shengzhong (Frank) Liu
Summary: All-inorganic CsPbX3 perovskites have attracted significant attention in recent years due to their excellent optoelectronic properties and wide range of applications. This review provides a brief introduction to the fundamental properties of CsPbX3 perovskites and summarizes the recent progress in crystallization modulation strategies for high-quality CsPbX3 films. The potential methods for improving the efficiency of inorganic PSCs are also discussed, offering insights into the future development prospects.
ADVANCED ENERGY MATERIALS
(2023)
Article
Polymer Science
Rui Zhao, Yuechen Li, Zicheng Ding, Ziang Wu, Han Young Woo, Kui Zhao, Xiaochen Wang, Shengzhong Frank Liu, Yongfang Li
Summary: Fabrication of high-efficiency organic solar cells using nonhalogen green solvents is desired, but the morphology control of the active layer remains challenging. In this study, a two-step heating strategy is proposed to optimize the morphology of the active layer based on a low-cost polymer donor and a small molecule acceptor. This strategy improves the charge generation, transport, and collection efficiency, resulting in a significantly higher device efficiency compared to nonoptimal conditions.
Article
Chemistry, Multidisciplinary
Dong Yang, Ruixia Yang, Cong Zhang, Tao Ye, Kai Wang, Yuchen Hou, Luyao Zheng, Shashank Priya, Shengzhong (Frank) Liu
Summary: A room-temperature-processed SnO2:OH electron-transport layer with reduced defect density and better energy band alignment has been demonstrated for flexible perovskite solar cells. The formation of hydrogen bonds at the interface produces an efficient electron-transfer channel, leading to enhanced electron extraction from the perovskite. With this ETL, a large-area flexible perovskite solar module reaches a PCE value of 18.71%, the highest reported so far for flexible perovskite solar modules. The long-term stability is also greatly improved due to the high quality perovskite film and the strong coupling between SnO2:OH and perovskite layer caused by hydrogen bonds, which effectively inhibits moisture permeation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tengteng Yang, Wangen Zhao, Yan Yang, Wenliang Huang, Kui Zhao, Shengzhong (Frank) Liu
Summary: In this study, lead (II) 2-ethylhexanoate (LDE) was introduced into perovskite films via an antisolvent process to improve the crystallization process and quality of the films. The coordination between the carboxyl functional group and Pb cation reduced defect density, while the long alkyl chains formed a protective layer on the surface to enhance stability. Consequently, the assembled device achieved a power conversion efficiency of 24.84% with improved thermal and operational stability due to reduced ion-migration channels.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jieqiong Liu, Tao Ye, Dongqu Yu, Shengzhong (Frank) Liu, Dong Yang
Summary: Flexible perovskite solar cells (FPSCs) with excellent recoverability have a wide range of potential applications in portable power sources. This review discusses recent progress and practical applications of high-recoverability FPSCs, as well as strategies to improve recoverability and environmental stability. Challenges in achieving high-performance FPSCs with long-term stability and high recoverability are also addressed. Future applications and perspectives for FPSCs are explored to promote commercialization processes for lightweight and durable FPSCs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zhiteng Wang, Qingwen Tian, Hao Zhang, Huidong Xie, Yachao Du, Lei Liu, Xiaolong Feng, Adel Najar, Xiaodong Ren, Shengzhong (Frank) Liu
Summary: Research has found that halide-related surface defects on inorganic halide perovskite can lead to charge recombination and affect the long-term stability of perovskite solar cells. Using density functional theory calculation, it has been verified that iodine interstitials (I-i) have a low formation energy and are easily formed on the surface of all-inorganic perovskite. A specific passivator called 2,6-diaminopyridine (2,6-DAPy) has been screened, which successfully eliminates iodine interstitials, dissociative iodine molecules, and passivates iodine vacancies. This passivation process improves the power-conversion efficiency (PCE) and environmental stability of the perovskite solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Wenjing Zhao, Meizi Wu, Zhike Liu, Shaomin Yang, Yong Li, Jungang Wang, Lu Yang, Yu Han, Shengzhong (Frank) Liu
Summary: Organic-inorganic hybrid perovskite solar cells (PSCs) have great potential as a photovoltaic technology, and the orientation of the perovskite film plays a crucial role in their efficiency and stability. In this study, researchers developed a method to grow a 2D perovskite seed layer, followed by the epitaxial growth of a 3D perovskite film to create a high-quality 2D/3D heterojunction. The oriented perovskite film exhibited excellent characteristics, resulting in PSCs with a champion efficiency of 24.83% and high stability under various conditions.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Lixia Ren, Qi Zhang, Yinyi Tian, Yong Li, Yanrui Zhang, Lu Zhang, Shuanhu Wang, Peng Zhai, Kexin Jin, Shengzhong (Frank) Liu
Summary: In this work, the authors successfully modulated the spin Seebeck thermopower (SSTP) in a Pt/MAPbBr(3)/NiFe nonlocal structure via longitudinal spin Seebeck effect measurements. They unraveled the effective injection of magnons into the perovskite film from the NiFe layer, and demonstrated the tunability of SSTP in this structure through optimization of morphology and component engineering of the organic-inorganic hybrid perovskite (OIHP) film.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jing Yang, Ziyu Wang, Lu Liu, Le Wang, Zhen Chang, Jianxun Li, Kai Wang, Shengzhong (Frank) Liu
Summary: Organic lead halide perovskites are considered suitable candidates for the photoactive layers of semitransparent solar cells. The performance of semitransparent perovskite solar cells can be enhanced by preparing perovskite films with excellent photoelectric properties and high transmittance. The study focuses on improving the crystallinity and morphology of wide-bandgap perovskite films through additive engineering, leading to significant improvements in power-conversion efficiency and average transmittance of the semitransparent solar cells.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Yang Yang, Lu Liu, Jianxun Li, Shuai Zhao, Zhen Chang, Le Wang, Dongqi Yu, Kai Wang, Shengzhong (Frank) Liu
Summary: In this work, we demonstrate an ambient aging process that appears to further improve the performance of wide-bandgap perovskite solar cells. The aging process induces secondary recrystallization and reduces defect density through air passivation and halogen redistribution. This leads to suppressed nonradiative recombination and prolonged carrier lifetime. The champion wide-bandgap perovskite solar cell achieved a power-conversion efficiency of 20.12% and a high open-circuit voltage of 1.27 V, making it one of the highest-performing wide-bandgap solar cells reported. This work reveals the impact of the air aging process on perovskite film properties and demonstrates a scalable post-treatment strategy for producing state-of-the-art semiconducting films.
Article
Nanoscience & Nanotechnology
Haoxiang Zhang, Minyong Du, Xinxin Xing, Hui Wang, Kai Wang, Shengzhong (Frank) Liu
Summary: A photo-rechargeable supercapacitor with P-diaminoazobenzene (P-Azo) as the electrode material is developed, providing excellent flexibility and high energy density for flexible wearable electronics. The use of P-Azo, which has a large pi-conjugated system and lower LUMO energy level, enhances electron transfer and conductivity. By assembling P-Azo, activated carbon, and an adhesive electrolyte, an asymmetric flexible supercapacitor is fabricated, demonstrating high energy density and capacitance retention. Coupling the supercapacitor with perovskite submodules achieves an overall energy-conversion efficiency of 7%. This supercapacitor presents a practical solution for powering future wearable electronics.
Article
Chemistry, Physical
Ming Chen, Zhicheng Shan, Xiaofeng Dong, Shengzhong(Frank) Liu, Zhuo Xu
Summary: To explore stable lead-free perovskites for solar cell applications, a series of Dion-Jacobson (DJ) double perovskites with the formula BDA(2)M(I)M(III)X(8) were proposed. First-principles calculations demonstrated the thermal stabilities of all the proposed BDA(2)M(I)M(III)X(8) perovskites. Three candidates with suitable solar band gaps and superior optoelectronic properties were selected for photovoltaic application. The study provides a new concept for designing lead-free perovskites for efficient solar cells.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Physical
Bita Farhadi, Dexu Zheng, Lu Liu, Jishuang Liu, Haoxiang Zhang, Lei Peng, Kai Wang, Shengzhong Liu
Summary: In this study, the physical properties of XSrI3 perovskite materials under pressure conditions were investigated using density-functional theory. It was found that applying pressure resulted in a reduction in lattice parameters and enhanced atom interactions, consequently influencing band structure and electronic states. The results suggest that pressure can potentially broaden light absorption range and improve optical performance in perovskite materials.
Article
Chemistry, Multidisciplinary
Yanrui Zhang, Lixia Ren, Peng Zhai, Jingjing Xin, Jiarong Wu, Qi Zhang, Xin Chen, Kui Zhao, Lu Zhang, Shengzhong (Frank) Liu
Summary: This study investigates the fabrication process of perovskite using water instead of toxic organic solvents. The high surface tension of water is overcome by designing a long-alkyl chain anionic surfactant, potassium oleate (PO), which reduces the surface tension and enables the production of high-quality, pinhole-free perovskite films. The use of PO also improves the formation kinetics of perovskite, resulting in a high power conversion efficiency (PCE) of 24.14% for PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zhuo Xu, Weidong Luo, Songyan Guo, Shengzhong Frank Liu
Summary: This work reveals the crucial role of spacer ligands in metal-2D perovskite junctions, which can significantly affect the contact properties. Ligands with different sizes and functional groups have been found to strongly influence the interface binding energy, Schottky barrier height, and tunneling property. Small-size ligands can effectively enhance the interface coupling and perturb the perovskite electronic properties, resulting in a high tunneling probability.
