Article
Engineering, Environmental
Xingdong Ding, Haoxin Wang, Cheng Chen, Hongping Li, Yi Tian, Qijun Li, Cheng Wu, Liming Ding, Xichuan Yang, Ming Cheng
Summary: In this study, two new hole transport materials based on phenothiazine core building blocks were reported for use in highly efficient perovskite solar cells (PSC). The results demonstrated that the PTZ-Py material exhibited excellent performance in modifying perovskite surface defects, improving electronic properties, and stability in PSCs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Yajie Fu, Yang Li, Guichuan Xing, Derong Cao
Summary: Perovskite solar cells have attracted much attention in recent years due to their low fabrication costs and improving efficiencies. However, the performance and stability of these cells are hindered by defect states in metal halide perovskites. Researchers have successfully designed and synthesized organic hole transport materials (HTMs) with excellent passivation function to address this issue. This review provides an overview of recent progress in the development of organic HTMs with defect passivation for efficient and stable perovskite solar cells.
MATERIALS TODAY ADVANCES
(2022)
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
Nanoscience & Nanotechnology
Jinghua Xu, Hongwei Qiao, Zhongliang Chen, Xue-Lu Wang, Ye-Feng Yao
Summary: A simple one-step method was used to prepare n-i-p-structured perovskite solar cells with a 3D/2D perovskite heterojunction as the absorption layer. By post-treating the surface of MAPbI(3) films with an organic ligand, the density of surface trap states was reduced, nonradiative recombination was suppressed, and the interface bands were aligned, resulting in a high power conversion efficiency of 21.93%.
Article
Chemistry, Multidisciplinary
Rong Tang, Haitao Liu, Yining Xu, Kaixing Chen, Jin Zhang, Ping Zhang, Cheng Zhong, Fei Wu, Linna Zhu
Summary: This study investigates the effects of molecular configuration on the properties and interactions of hole-transporting materials (HTMs) in perovskite solar cells. Two small molecules with different configurations are developed as HTMs, and the results show that a flexible molecular configuration can efficiently interact with the perovskite material, leading to improved device efficiency and stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Zhen Zhang, Shenglin Si, Wenqiang Luo, Yunqi Liang, Zihao Xian, Haoxin Wen, Xinxing Huang, Tianzhou Yin, Yixuan Guo, Hualin Wu, Yong Xu, Shaoming Huang
Summary: This study demonstrates a new method to enhance the efficiency and stability of perovskite solar cells (PSCs) by adding an ionic liquid as a dual functional additive. This additive can passivate the defects in the perovskite absorber and improve the hydrophobicity of the hole transport layer, resulting in a significant increase in power conversion efficiency from 21.07% to 23.34%.
Article
Chemistry, Physical
Jianxing Xia, Yi Zhang, Chuanxiao Xiao, Keith Gregory Brooks, Min Chen, Junsheng Luo, Hua Yang, Nadja Isabelle Desiree Klipfel, Jihua Zou, Yu Shi, Xiaojun Yao, Jiangzhao Chen, Joseph M. Luther, Hongzhen Lin, Abdullah M. Asiri, Chunyang Jia, Mohammad Khaja Nazeeruddin
Summary: This study reports a new dopant, DIC-PBA, as an alternative to Li-TFSI/t-BP, which improves the stability and efficiency of perovskite solar cells. Experimental results show that DIC-PBA can effectively dope HTMs and the perovskite surface, improving interfacial charge transport and thus enhancing the stability and efficiency of the cells.
Article
Chemistry, Applied
Zi'an Zhou, Xianfu Zhang, Yongpeng Liang, Rahim Ghadari, Cheng Liu, Xuepeng Liu, Zhongyan Zhang, Shuang Ma, Yong Ding, Molang Cai, Songyuan Dai
Summary: The introduction of cyano (C N) functional group into hole transporting materials (HTM) in perovskite solar cells has been shown to improve performance, with C N-based HTM exhibiting higher power-conversion efficiency and minor hysteresis compared to non-C N-based HTM. Additionally, devices with C N-based HTM show significantly improved stability compared to non-C N-based HTM.
Article
Chemistry, Inorganic & Nuclear
Chenghao Song, Huiwei Du, Menglei Xu, Jie Yang, Xinyu Zhang, Jungan Wang, Yuanfang Zhang, Chengjun Gu, Rui Li, Tao Hong, Jingji Zhang, Jiangying Wang, Yongchun Ye
Summary: This study improves the performance of perovskite solar cells by using a dual-hole transport layer strategy. This strategy enhances the charge transfer efficiency of the transport layer, reduces charge recombination, and improves the quality of the perovskite film layer. Ultimately, the stability of the device is enhanced.
DALTON TRANSACTIONS
(2024)
Article
Materials Science, Multidisciplinary
Jiahui Li, Fei Gao, Jialun Wen, Zhuo Xu, Chaoqun Zhang, Xiaodong Hua, Xuediao Cai, Yuanrui Li, Bonan Shi, Yu Han, Xiaodong Ren, Shengzhong (Frank) Liu
Summary: This study successfully passivated ionic defects in perovskite films by using PBBN, which significantly suppressed non-radiative recombination and improved efficiency and stability of perovskite solar cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Cheng Liu, Cansu Igci, Yi Yang, Olga A. Syzgantseva, Maria A. Syzgantseva, Kasparas Rakstys, Hiroyuki Kanda, Naoyuki Shibayama, Bin Ding, Xianfu Zhang, Vygintas Jankauskas, Yong Ding, Songyuan Dai, Paul J. Dyson, Mohammad Khaja Nazeeruddin
Summary: This study developed a dopant-free D-pi-A type HTM, CI-TTIN-2F, which provides multisite defect-healing effects on CsPbI3 surface, significantly improving the photovoltaic efficiency and thermal stability of CsPbI3 perovskites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Xiaofei Ji, Tong Zhou, Qiang Fu, Wenxuan Wang, Ziang Wu, Mingtao Zhang, Xugang Guo, Dongxue Liu, Han Young Woo, Yongsheng Liu
Summary: This study proposes an effective two-dimensional conjugate engineering strategy to improve the hole mobility of dopant-free small molecule HTMs. The incorporation of triphenylamine (TPA) groups as side chains of benzo[1,2-b:4,5-b']dithiophene (BDT) unit extends the longitudinal conjugate and achieves two donor-acceptor-acceptor type 2D small molecules with dominant face-on orientation and better hole transport mobility. The incorporation of alkoxy Lewis base groups further enhances the defect passivation for perovskite surfaces. As a result, the perovskite solar cells using the developed HTM show significantly improved efficiency and long-term stability.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
Zhi-Wen Gao, Yong Wang, Wallace C. H. Choy
Summary: This article examines the latest progress in modifying the buried interface of organic-inorganic hybrid perovskite solar cells (PSCs) to enhance their performance and stability. It discusses the use of various materials and techniques and provides valuable insights for achieving higher power conversion efficiency in PSCs and interface adjustment in other layered structure heterojunction devices.
ADVANCED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Runtao Wang, Tian-Ge Sun, Tai Wu, Zhongqi Zhu, Jiang-Yang Shao, Yu-Wu Zhong, Yong Hua
Summary: The novel pyrene-based organic material TAAPyr is introduced as a defect passivation layer and a protect layer against moisture for perovskite solar cells (PSCs) application, effectively decreasing surface defects and nonradiative recombination while enhancing carrier transport and power conversion efficiencies. The multi-functional pi-conjugated passivator TAAPyr shows potential in improving efficiency and stability of PSCs by promoting intermolecular face-to-face stacking and making the perovskite surface more hydrophobic.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Linfeng Zhang, Guohui Luo, Weihao Zhang, Yuxin Yao, Penghui Ren, Xiuhong Geng, Yi Zhang, Xiaoping Wu, Lingbo Xu, Ping Lin, Xuegong Yu, Peng Wang, Can Cui
Summary: This study introduces trioctylphosphine oxide (TOPO) into the precursor to provide tensile strain outside the perovskite lattice, improving crystallization and inhibiting ion migration. The TOPO molecule also passivates grain boundaries and undercoordinated Pb2+ defects. The synergistic effect of Cs+ and TOPO additives significantly enhances the performance of the solar cells.
Article
Nanoscience & Nanotechnology
Xingdong Ding, Haoxin Wang, Yawei Miao, Cheng Chen, Mengde Zhai, Chuansu Yang, Biyi Wang, Yi Tian, Ming Cheng
Summary: Chemical additive engineering, specifically introducing a small organic molecule 3,5-bis(trifluoromethyl)benzoic acid (6FBzA), has been shown to significantly enhance the power conversion efficiency and stability of perovskite solar cells. The improved properties are attributed to the healing of Pb2+ defects at the surface, suppression of trap-assisted nonradiative recombination, and enhanced interfacial charge extraction and transfer. The 6FBzA-treated device achieved a champion PCE and demonstrated good long-term stability under ambient air conditions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Govindasamy Sathiyan, Haoxin Wang, Cheng Chen, Yawei Miao, Mengde Zhai, Ming Cheng
Summary: Perovskite solar cells (PSCs) have attracted significant attention in photovoltaic technologies due to their desirable properties. Fluorine substitution in organic materials is widely used to enhance the performance and stability of PSCs. This review discusses the effects of fluorine substitution in different layers of PSCs and its chemical interactions with the perovskite layer.
Article
Chemistry, Physical
Haoxin Wang, Ming Cheng, Xichuan Yang, Ze Yu, Licheng Sun
Summary: A solution post-treatment method using a chlorophyll derivative, sodium copper chlorophyllin (NaCu-Chl), is employed to passivate the defects on the surface of perovskite films. The treatment effectively suppresses nonradiative recombination and improves film morphology, resulting in perovskite solar cells with enhanced power conversion efficiency and stability. This study provides insights into the application of natural products and derivatives for the fabrication of perovskite solar cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Applied
Mengde Zhai, Yawei Miao, Haoxin Wang, Linqin Wang, Xingdong Ding, Cheng Chen, Ming Cheng
Summary: This study developed two HTMs, PTZT-MPF and PTZT-FF, based on PTZ as the core unit. Among them, PTZT-MPF showed higher hole mobility and smoother film morphology, resulting in promising PCE for PSCs.
Article
Chemistry, Physical
Biyi Wang, Haoxin Wang, Govindasamy Sathiyan, Cheng Chen, Yan Xu, Ming Cheng
Summary: In this study, dopant-free hole-transporting materials (HTMs) based on three pyrrolo[3,2-b]pyrrole (PP) core building blocks with different fluorine substitutions were synthesized and applied in inverted perovskite solar cells (PSCs). The number and position of fluorine substitutions had a significant impact on the photochemical and photovoltaic performances of the resulting HTMs. The hexafluorine-substituted HTM, 6FPPY, exhibited excellent hole extraction efficiency and achieved a remarkable power conversion efficiency (PCE) of 20.1% with negligible hysteresis and good long-term stability. This work paves the way for the design of cost-effective, dopant-free HTMs for high-performance inverted PSCs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Yawei Miao, Zhenyong Wang, Cheng Chen, Xingdong Ding, Mengde Zhai, Licheng Liu, Ziyang Xia, Haoxin Wang, Ming Cheng
Summary: This study reports the use of an ionic liquid with multifunctional cations and Cl anion to improve the performance of FAPbI(3) solar cells. The treatment suppresses nonradiative recombination and phase transition in the perovskite film, leading to significantly improved efficiency and stability of the solar cells.
Article
Chemistry, Multidisciplinary
Xiaowen Zhou, Xingdong Ding, Haoxin Wang, Yawei Miao, Cheng Chen, Mengde Zhai, Ming Cheng
Summary: In this study, two novel hole-transport materials (HTMs) named THP-1 and THP-2 were successfully synthesized. THP-1 exhibited better optoelectronic properties compared to THP-2 due to its suitable energy level and molecular structure. After optimization, PSCs based on THP-1 achieved a high power conversion efficiency of 20.47%, higher than that of THP-2 (17.16%), and comparable to the control device based on spiro-OMeTAD (20.28%). Moreover, THP-1 showed excellent stability with 71.5% of its initial efficiency maintained after 840 hours of aging tests.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Ziyang Xia, Jinwei Meng, Cheng Chen, Haoxin Wang, Mengmeng Zheng, Xiaowen Zhou, Xingdong Ding, Yawei Miao, Mengde Zhai, Ming Cheng
Summary: This study proposes a strategy to passivate the top surface defects of perovskite film, which improves the efficiency and stability of perovskite solar cells. By using tetrabutylammonium hexafluorophosphate (TBAH), the efficiency of small-size perovskite solar cells increased from 20.0% to 22.0%, and the TBAH treated cells retained 80% of the initial efficiency after 700 hours of aging test.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Applied
Licheng Liu, Yawei Miao, Mengde Zhai, Tai Wu, Xingdong Ding, Haoxin Wang, Cheng Chen, Yong Hua, Li Guo, Ming Cheng
Summary: In this paper, a new electron donor ACR-Cz-DM is reported, which significantly improves the performance of perovskite solar cells. ACR-Cz-DM is constructed based on ACR and Cz-DM, exhibiting excellent hole mobility and conductivity, as well as good film formation and outstanding charge extraction and transport ability. The photoelectric conversion efficiency (PCE) of FAPbI3-based PSCs using ACR-Cz-DM as the electron donor reaches 21.37%, surpassing that of Spiro-OMeTAD-based PSCs (20.10%) under the same conditions.
Article
Chemistry, Physical
Yawei Miao, Mengde Zhai, Zhenxiao Zhao, Xingdong Ding, Ziyang Xia, Haoxin Wang, Linqin Wang, Cheng Chen, Ming Cheng
Summary: In this study, two asymmetric small molecules, BTD-DA and BTD-PA, were designed and synthesized to modify the perovskite/Spiro-OMeTAD interface in order to improve the photovoltaic performance of perovskite solar cells (PSCs). The molecule BTD-PA showed better defect passivation and energy level regulation due to its strong interaction with the uncoordinated Pb2+ on the perovskite surface. PSCs treated with BTD-PA achieved a champion power conversion efficiency of 24.46% and 22.46% for different active areas, and showed improved long-term stability.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Zi-Yang Xia, Wei Zhang, Cheng Chen, Hao-Xin Wang, Lin-Qin Wang, Ya-Wei Miao, Xing-Dong Ding, Li-Cheng Sun, Ming Cheng
Summary: In order to overcome the energy loss caused by the valence band offset between Cs2AgBiBr6 and the hole transport layer (HTL), a novel deep-level hole transport material (HTM) was designed and synthesized to optimize the energy level alignment. While the introduction of deep-level HTMs successfully reduced the valence band offset between Cs2AgBiBr6 and HTL, it also increased the valence band offset at the HTL/Au interface, limiting the improvement of the power conversion efficiency (PCE). To further improve the PCE, a gradient energy level arrangement combining the newly developed deep-level HTM with Spiro-OMeTAD was constructed. Through optimization, an impressive PCE of 3.50% with high open-circuit voltage and fill factor was achieved, making it one of the best Cs2AgBiBr6 perovskite solar cells.
Article
Chemistry, Multidisciplinary
Xingdong Ding, Xiaowen Zhou, Haoxin Wang, Mengde Zhai, Ziyang Xia, Licheng Liu, Yi Tian, Cheng Chen, Ming Cheng
Summary: Novel hole transport materials DTP-1 and DTP-2 were successfully synthesized, resulting in improved efficiency of perovskite solar cells. After optimization, DTP-1 showed a power conversion efficiency of 21.1% and demonstrated high stability under high humidity and room temperature conditions.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yicheng Wang, Chuansu Yang, Jinwei Meng, Cheng Chen, Hao Zhuang, Haoxin Wang, Ming Zhang, Hui Xu, Ming Cheng
Summary: Precise molecular configuration design of hole transport materials (HTMs) is essential for achieving highly efficient perovskite solar cells (PSCs). In this study, three small molecular HTMs named TPA-DF, CZ-DF, and CZ-DM are designed and synthesized by combining the core units of triphenylamine and carbazole with different peripheral groups. The effects of core building block configuration and terminal group donating ability on optical, electrochemical, and photovoltaic properties are systematically examined. The CZ-DF based PSCs device achieves a power conversion efficiency (PCE) of 21.5% and retains 79.5% of its initial PCE after aging at 65 °C and 45-60% relative humidity (RH) in an air environment.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yukun Qin, Jing Tan, Shuai Meng, Yuchen Li, Mengde Zhai, Xiaoxian Song, Cheng Chen, Xudong Ren, Qijun Li, Ming Cheng, Jianning Ding
Summary: Moisture-enabled electricity generation (MEG) is a sustainable technique for generating electric power. Carbon dots (CDs) are low-cost and can be surface-functionalized, making them promising materials for MEG devices. In this study, CDs were functionalized with 1,5-naphthalenedisulfonic acid (1,5-NDSA), resulting in a CD-based MEG device with a record-high voltage output of 380 mV. The functionalized CDs facilitated proton gradient formation and improved ionic conductivity, leading to enhanced electricity output. The assembled device can power an electronic calculator and the output can be further boosted in moist air, making it suitable for windy and high humidity areas.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Haoyu Li, Zhangyan Wang, Yuanqing Sun, Yangyang Su, Zhenxiao Zhao, Yi Tian, Hongping Li, Ming Cheng
Summary: Hole transport materials (HTMs) play a crucial role in improving the performance of perovskite solar cells (PSCs). In this study, four biased structured HTMs based on 2,6-substituted azulene were synthesized and evaluated. The HTMs with more bias structure exhibited better electronic properties, and peripheral substitution on the 6-position of azulene had a significant impact on solubility and film formation. The highest power conversion efficiency (PCE) of 16.16% was achieved by Azu-2T6F when applied in PSCs.
NEW JOURNAL OF CHEMISTRY
(2023)
