School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.
Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing, 100190, China.
Chem Commun (Camb). 2023 Feb 21;59(16):2251-2254. doi: 10.1039/d2cc07021a.
Poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) shows great potential for applications in tin halide perovskite solar cells (TPSCs). Nevertheless, the physicochemical, electrical properties and surface characteristics of pristine PEDOT:PSS are poorly suitable for high-quality tin halide perovskite films, as well as for efficient carrier transport. In this work, we tuned the phase separation of PEDOT and PSS chains by ammonium carbamate (AC). The modified film showed a lower trap density and more facile carrier transport than did the pristine film. Consequently, the target TPSCs achieved a substantially improved short-circuit photocurrent () and open-circuit voltage (), together with a markedly improved power conversion efficiency (PCE) from 9.48% to 11.24%.
聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）在卤化锡钙钛矿太阳能电池（TPSCs）中有很大的应用潜力。然而，原始的 PEDOT：PSS 的物理化学、电学性质和表面特性不太适合高质量的卤化锡钙钛矿薄膜以及高效的载流子传输。在这项工作中，我们通过氨基甲酸铵（AC）来调节 PEDOT 和 PSS 链的相分离。与原始薄膜相比，改性后的薄膜具有更低的陷阱密度和更易的载流子输运。因此，目标 TPSCs 的短路光电流（）和开路电压（）有了显著提高，同时功率转换效率（PCE）从 9.48%提高到了 11.24%。
