题目：Hole Transport Layer-Free Low-Bandgap Perovskite Solar Cells for Efficient All-Perovskite Tandems
作者：Tianshu Ma, Huayang Wang, Zhanghao Wu, Yue Zhao, Cong Chen, Xinxing Yin, Lin Hu,Fang Yao, Qianqian Lin, Shaojun Wang,* Dewei Zhao,* Xiaofeng Li,* and Changlei Wang*
单位：
a School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology ,Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China ,Soochow University,Suzhou 215006, China
b College of Materials Science and Engineering & Institute of New Energy and Low-Carbon Technology ,Engineering Research Center of Alternative Energy Materials & Devices Ministry of Education,Sichuan University,Chengdu 610065,China
c China-Australia Institute for Advanced Materials and Manufacturing(IAMM),Jiaxing University,Jiaxing 314001, China
d Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education of China,School of Physics and Technology,Wuhan University,Wuhan 430072, China
摘要：Low-bandgap (LBG, Eg ≈1.25 eV) tin-lead(Sn-Pb) perovskite solar cells (PSCs) play critical roles in constructing efficient all-perovskite tandem solar cells (TSCs) that can surpass the efficiency limit of single-junction solar cells. However, the traditional poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer (HTL) in LBG PSCs usually restricts device efficiency and stability. Here, a strategy of employing 2-aminoethanesulfonic acid(i.e., taurine) as the interface bridge to fabricate efficient HTL-free LBG PSCs with improved optoelectronic properties of the perovskite absorbers at the buried contacts is reported. Taurine-modified ITO substrate has lower optical losses, better energy level alignment, and higher charge transfer capability than PEDOT:PSS HTL, leading to significantly improved open-circuit voltage (VOC) and short-circuit current density of corresponding devices. The best-performing LBG PSC with a power conversion efficiency (PCE) of 22.50% and an impressive VOC of 0.911 V is realized, enabling all-perovskite TSCs with an efficiency of 26.03%. The taurine-based HTL-free TSCs have highly increased stability, retaining more than 90% and 80% of their initial PCEs after constant operation under 1-sun illumination for 600 h and under 55 °C thermal stress for 950 h, respectively. This work provides a facile strategy for fabricating efficient and stable perovskite devices with a simplified HTL-free architecture.
影响因子：29.4
链接：https://onlinelibrary.wiley.com/doi/10.1002/adma.202308240