Article
Chemistry, Multidisciplinary
Xue Wang, Dong Zhang, Baoze Liu, Xin Wu, Xiaofen Jiang, Shoufeng Zhang, Yan Wang, Danpeng Gao, Lina Wang, Haolin Wang, Zongming Huang, Xiangfan Xie, Tao Chen, Zhengguo Xiao, Qiyuan He, Shuang Xiao, Zonglong Zhu, Shangfeng Yang
Summary: This work presents a novel and effective mixed-cation passivation system to synergically passivate various types of traps in wide-bandgap perovskite, resulting in record performance of perovskite/organic tandem solar cells. The improvements include increased open-circuit voltage and fill factor, leading to a record power conversion efficiency. Additionally, the passivation system improves the photo and thermal stability of the solar cells.
ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Hongwei Lai, Jinlong Hu, Xinming Zhou, Linliang Cai, Qingchen He, Chaoran Chen, Zhenhua Xu, Xiudi Xiao, Donghui Lan, Yaohua Mai, Fei Guo
Summary: Thin films of tin-lead alloyed perovskites with tunable bandgaps are gaining attention for their efficient photovoltaic devices. This study demonstrates that in addition to improving crystal quality, reducing nonradiative recombination losses at interfaces is crucial for efficient solar cells. Aromatic amine passivation, layered heterojunction, and polyelectrolyte doping are effective methods to suppress nonradiative recombination and enhance device performance.
Article
Materials Science, Multidisciplinary
M. Sulaman, S. Y. Yang, Z. H. Zhang, A. Imran, A. Bukhtiar, Z. H. Ge, Y. Tang, Y. R. Jiang, L. B. Tang, B. S. Zou
Summary: Metal-halide perovskite-based photodetectors are currently the most rapidly emerging technology in the field of research and development. Lead-free inorganic perovskites have shown potential as an alternative material for optoelectronic devices, but their high trap state density and surface non-uniformity have limited their performance. This work presents a method for surface-passivation of lead-free perovskites with poly (3-hexylthiophene) to improve the performance of photodetectors.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Md Arafat Mahmud, Huyen T. Pham, The Duong, Yanting Yin, Jun Peng, Yiliang Wu, Wensheng Liang, Li Li, Anand Kumar, Heping Shen, Daniel Walter, Hieu T. Nguyen, Naeimeh Mozaffari, Grace Dansoa Tabi, Gunther Andersson, Kylie R. Catchpole, Klaus J. Weber, Thomas P. White
Summary: The introduction of 2D perovskite for modifying 3D perovskite films has been shown to enhance both surface and bulk defect passivation, leading to improved efficiency of perovskite solar cells. The study demonstrates that Cl- anion diffuses into the perovskite lattice to passivate defects, while octylammonium ligands provide effective surface passivation. The diffusion of Cl- into the perovskite lattice occurs independently of 2D perovskite crystallization and contributes to effective bulk passivation.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Qingjie Feng, Guangjun Nan
Summary: The Rashba effect in different phases of MAPbX(3) (MA = CH3NH3 andX = I and Br) was investigated using the density functional theory approach. The study revealed that the Rashba effect in MAPbX(3) with the ordered arrangement of MA cations is progressively weakened as the temperature decreases, mainly due to the reduced distortion of inorganic octahedrons. Additionally, the angle-resolved Rashba splitting in MAPbI(3) is not significantly affected by going from the bulk to the surfaces in the room-temperature phase, while in MAPbBr(3), the bulk Rashba splitting collapses into anisotropic Rashba splitting at the surfaces. These findings provide insights for manipulating spin-polarized carrier dynamics in photovoltaic and spintronic devices with LHPs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Tianyi Huang, Rui Wang, Selbi Nuryyeva, Shaun Tan, Jingjing Xue, Yepin Zhao, Quantan Wu, Marc H. Weber, Pei Cheng, Dong Meng, Ilhan Yavuz, K. N. Houk, Yang Yang
Summary: The superior bandgap tunability of solution-processed halide perovskite makes it a promising candidate for multi-junction photovoltaics, with the additional benefit of simplified technology transfer when optically coupling wide-gap perovskite with commercially available PVs such as silicon and CIGS. By utilizing a sequential fluoride and organic ammonium salt surface passivation strategy, the authors were able to control non-radiative energy losses and achieve high efficiencies in wide-gap perovskite solar cells, especially when stacked with commercial Si and CIGS products.
Review
Chemistry, Physical
Yulan Huang, Tanghao Liu, Dongyang Li, Dandan Zhao, Abbas Amini, Chun Cheng, Guichuan Xing
Summary: This review summarizes the major scientific and technical limitations of PTSCs, discussing their configurations, working principles, and developments. It analyzes the main drawbacks and underlying mechanisms of front subcells and rear subcells, as well as the role and progress of ICLs in ensuring continuous current in 2T PTSCs, while also summarizing the stability of PTSCs.
Article
Chemistry, Physical
Thomas Campos, Pia Dally, Stephanie Gbegnon, Alexandre Blaizot, Gaelle Trippe-Allard, Marion Provost, Muriel Bouttemy, Aurelien Duchatelet, Damien Garrot, Jean Rousset, Emmanuelle Deleporte
Summary: The formation of 2D/3D perovskite heterostructures has shown promise in improving the interface between perovskite and electron/hole transport layers in solar cells. In this study, a thin 2D perovskite layer was formed on top of a 3D triple-cation perovskite using a spacer cation in isopropyl alcohol. This resulted in a significant improvement in device open-circuit voltage and power conversion efficiency. The study also revealed the presence of bromide in the 2D phase and demonstrated the impact of the chemical composition of the underlying 3D layer on the stoichiometry of the 2D perovskite.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Zheng Zhang, Muhammad Akmal Kamarudin, Ajay Kumar Baranwal, Gaurav Kapil, Shahrir Razey Sahamir, Yoshitaka Sanehira, Mengmeng Chen, Liang Wang, Qing Shen, Shuzi Hayase
Summary: Lead-free tin perovskite solar cells (PKSCs) have low efficiency due to rough surface morphology and high number of defects. A posttreatment strategy using sequential passivation with acetylacetone (ACAC) and ethylenediamine (EDA) is proposed to reduce trap density, enlarge grain size, and regulate energy level. The study achieves a promising 13% efficiency with better stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Danni Yu, Qi Wei, Hansheng Li, Junhan Xie, Xianyuan Jiang, Ting Pan, Hao Wang, Mengling Pan, Wenjia Zhou, Weimin Liu, Philip C. Y. Chow, Zhijun Ning
Summary: The combination of comprehensive surface passivation and effective interface carrier transfer plays a critical role in high-performance perovskite solar cells. A new molecule, 2-thiopheneethylamine thiocyanate (TEASCN), is synthesized to construct a bilayer quasi-2D structure on a tin-lead mixed perovskite surface. This bilayer structure passivates the perovskite surface and ensures effective carrier transfer, resulting in improved open-circuit voltage and certified efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Yue Yu, Rui Liu, Chang Liu, Xiao-Lei Shi, Hua Yu, Zhi-Gang Chen
Summary: The use of 4-fluoro-phenylethylammonium iodide (FPEAI) as a dual-functional agent promotes oriented crystallization and comprehensive passivation of wide-bandgap perovskite solar cells (WBG PSCs), resulting in enhanced photovoltaic performance and stability.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Xinyi Liu, Huijun Lian, Ziren Zhou, Can Zou, Jin Xie, Fan Zhang, Haiyang Yuan, Shuang Yang, Yu Hou, Hua Gui Yang
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)
Article
Chemistry, Physical
Zhenheng Zhang, Shengyi Yang, Muhammad Sulaman, Zhenhua Ge, Jinming Hu, Hui Peng, Libin Tang, Bingsuo Zou, Yurong Jiang
Summary: Tin-based perovskites have gained attention for their non-toxic properties, but their poor stability limits their applications. In this study, Cs ions were introduced as a precursor and PVK was added to improve stability and performance of Tin-based perovskite photodetectors. The resulting devices showed enhanced responsivity and detectivity, and exhibited good stability after 14 days of storage. This approach combining A-site cation engineering and surface-passivating engineering provides a facile method for high-performance and high-stability Tin-perovskite photodetectors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Rui He, Zongjin Yi, Yi Luo, Jincheng Luo, Qi Wei, Huagui Lai, Hao Huang, Bingsuo Zou, Guangyao Cui, Wenwu Wang, Chuanxiao Xiao, Shengqiang Ren, Cong Chen, Changlei Wang, Guichuan Xing, Fan Fu, Dewei Zhao
Summary: This study reports a facile strategy to reduce the open-circuit voltage losses in wide-bandgap perovskite solar cells using post-treatment with ammonium halides. By forming pure 2D perovskites atop 3D wide-bandgap perovskites through low-temperature annealing, optimal defect passivation and surface electric-field effects are achieved. The resulting inverted champion device demonstrates a high V-OC and power conversion efficiency, enabling the development of a four-terminal all-perovskite tandem solar cell with a high efficiency exceeding 25% when combined with a low-bandgap perovskite solar cell.
Article
Energy & Fuels
Elena J. Cassella, Timothy Thornber, Robert D. J. Oliver, Mary E. O'Kane, Emma L. K. Spooner, Rachel C. Kilbride, Thomas E. Catley, Onkar S. Game, Alexandra J. Ramadan, David G. Lidzey
Summary: Defect management in perovskite solar cells through surface passivation is crucial for improving stability and efficiency. This study demonstrates the use of spray-coating technology to deposit iso-butylammonium bromide, resulting in the formation of a quasi-2D perovskite layer and significant improvement in device performance.
Article
Chemistry, Multidisciplinary
Arman Mahboubi Soufiani, Robert Lee-Chin, Paul Fassl, Arafat Mahmud, Michael E. Pollard, Jianghui Zheng, Juergen W. Weber, Anita Ho-Baillie, Thorsten Trupke, Ziv Hameiri
Summary: A novel camera-based method using a single bandpass filter is developed for direct implied open-circuit voltage (iV(OC)) imaging of large-area photovoltaic solar cells. The method allows imaging of different absorber compositions and surface morphologies without additional detection optics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jianghui Zheng, Weiyuan Duan, Yuzhen Guo, Zijun C. Zhao, Haimang Yi, Fa-Jun Ma, Laura Granados Caro, Chuqi Yi, Jueming Bing, Shi Tang, Jiangtao Qu, Kean Chern Fong, Xin Cui, Yan Zhu, Limei Yang, Andreas Lambertz, Md Arafat Mahmud, Hongjun Chen, Chwenhaw Liao, Guoliang Wang, Marko Jankovec, Cheng Xu, Ashraf Uddin, Julie M. Cairney, Stephen Bremner, Shujuan Huang, Kaining Ding, David R. McKenzie, Anita W. Y. Ho-Baillie
Summary: This article reports an elegant method to integrate perovskites and Si-heterojunction tandem solar cells using an ultra-thin indium tin oxide (ITO) interlayer, which overcomes the efficiency limit of single junction solar cells. It is found that a 1.7 nm ITO interlayer provides efficient interfacing between the silicon and perovskite subcells. Thinner ITO interlayers result in discontinuous films, while thicker ITO interlayers are less effective in localizing shunts.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Chwen-Haw Liao, Md Arafat Mahmud, Anita W. Y. Ho-Baillie
Summary: Metal halide perovskite materials, especially 2D layered perovskites, show great potential for optoelectronic applications due to their stability, tunable bandgap, and electronic confinement effect. This review analyzes the crystallography and electronic properties of different 2D perovskite phases and critically reviews the recent development of optoelectronic devices based on layered perovskite materials. The paper also identifies important future research directions for different optoelectronic devices, providing comprehensive guidance for new research in this field.
Article
Chemistry, Physical
Md Arafat Mahmud, Jianghui Zheng, Shi Tang, Chwenhaw Liao, Guoliang Wang, Jueming Bing, Tik Lun Leung, Anh Dinh Bui, Hongjun Chen, Jianpeng Yi, Stephen P. Bremner, Hieu T. Nguyen, Anita W. Y. Ho-Baillie
Summary: State-of-the-art perovskite-perovskite tandem solar cells use a water-based PEDOT:PSS hole transport layer in the low bandgap subcell, but its use is limited due to moisture sensitivity and insulating property. We overcome this limitation by using a water-free and PSS-free PEDOT-based hole transport layer, achieving higher efficiency and reproducibility in perovskite-perovskite tandems.
ACS ENERGY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xuan Minh Chau Ta, Thi Kim Anh Nguyen, Anh Dinh Bui, Hieu T. T. Nguyen, Rahman Daiyan, Rose Amal, Thanh Tran-Phu, Antonio Tricoli
Summary: Photoelectrochemical water splitting is a promising approach to produce green hydrogen using solar energy. However, the lack of efficient photoanodes to catalyze the water photooxidation reaction remains a challenge. In this study, nanostructured FeWO4 photoanodes were synthesized on a fluorine doped tin oxide glass substrate via a scalable and ultra-fast flame synthesis route. The optimized FeWO4 photoanode with a bandgap of 1.82 eV and a FeOOH/NiOOH co-catalyst coating showed improved water photooxidation performance and good photostability, providing insights for the engineering of small band-gap catalysts for various photoelectrochemical applications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Hong Zhao, Zhong Zheng, Haoruo Zhou, Li Chang, Kostadinos Tsoutas, Limei Yang, Seyedeh K. H. Alavi, Yanping Liu, Behnam Akhavan, Marcela M. Bilek, Zongwen Liu
Summary: High entropy alloys (HEAs) are a new class of materials with high strength, high corrosion and oxidation resistance, and superb thermal stability. In this study, AlCrFeCoNiCu0.5 HEA thin films were fabricated using cathodic arc deposition, and the growth mechanisms and microstructures of the films were investigated by varying arc and duct currents. The crystallography of the films was analyzed using X-ray diffraction (XRD), and the film chemistry and microstructure of the film-substrate interphase were comprehensively studied using transmission electron microscopy (TEM). The results show that the grain size, hardness, and surface roughness of the HEA thin films can be effectively controlled. This study has important implications for the industrial-scale fabrication of HEA thin films using cathodic arc deposition.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jiali Wang, Sieu Pheng Phang, Christian Samundsett, Zhuofeng Li, Thien N. Truong, Jie Yang, Zhao Wang, Peiting Zheng, Xinyu Zhang, Hieu T. Nguyen, Daniel Macdonald, Josua Stuckelberger
Summary: In this study, high-quality localized phosphorus-doped polycrystalline silicon passivating contacts with nanoscale poly-Si film on an ultrathin SiOx layer were fabricated using an inkjet printing technique. The effects of printer settings, dopant concentration, and annealing temperature on the contact performance were investigated. Good surface passivation was achieved with optimized conditions, and after hydrogenation treatment, the implied open-circuit voltage was further improved.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Shi Tang, Stefania Peracchi, Zeljko Pastuovic, Chwenhaw Liao, Alan Xu, Jueming Bing, Jianghui Zheng, Md Arafat Mahmud, Guoliang Wang, Edward Dominic Townsend-Medlock, Gregory J. Wilson, Girish Lakhwani, Ceri Brenner, David R. McKenzie, Anita W. Y. Ho-Baillie
Summary: The reduction in space hardware costs has enabled commercial space to emerge. Radiation-hard organometal halide perovskite solar cells (PSCs) have the potential for low-cost and high-efficiency space applications. The study tested high-efficiency PSCs with different hole transport materials (HTMs) and dopants under proton irradiation, and found that PSCs with specific HTMs and dopants were more tolerant to higher-fluence radiation. The insights gained from this study will contribute to the development of low-cost lightweight solar cells for space applications.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chuqi Yi, Zhuangyi Zhou, Mattias Klaus Juhl, Jingnan Tong, Kean Chern Fong, Fiacre Emile Rougieux, Stephen Bremner
Summary: Epitaxial monolithic III-V/Si tandem solar cells are a promising technology to improve the efficiency of silicon solar cells. However, the degradation of silicon wafers during annealing in the molecular beam epitaxy chamber is a key limitation. This study investigates the nature of contaminants in the chamber using photoluminescence imaging, lifetime spectroscopy, and deep level transient spectroscopy. The results reveal the diffusion of impurities into the silicon wafers during annealing, with at least two types of impurities detected. Phosphorus diffusion restricts the localized impurity, but does not prevent the diffusion of other impurities. Extrinsic impurities with characteristics similar to Cr and CrB are found, while Fe or FeB is not observed. The emission rates and concentrations of electrically active defects are measured, but do not match known Cr-related defects.
Article
Nanoscience & Nanotechnology
Bikesh Gupta, Doudou Zhang, Hongjun Chen, Chennupati Jagadish, Hark Hoe Tan, Siva Karuturi
Summary: This study presents a novel approach for fabricating high-performance solar cells based on InP heterojunctions using a solution-processed ferri-hydrite (Fh) electron-selective contact (ESC). The champion cell efficiency of 16.6% is achieved, which is a significant improvement over those from previous studies using other solution-processed ESC materials. The Fh layer not only selectively extracts photogenerated electrons from InP but also simultaneously serves as a surface protection layer, improving the cell's long-term stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
