State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , PR China.
Department of Materials Science and Engineering , Monash University , Clayton , Victoria 3800 , Australia.
ACS Appl Mater Interfaces. 2018 May 2;10(17):14922-14929. doi: 10.1021/acsami.8b02624. Epub 2018 Apr 18.
Organic-inorganic metal halide perovskite solar cells (PSCs) have been emerging as one of the most promising next generation photovoltaic technologies with a breakthrough power conversion efficiency (PCE) over 22%. However, aiming for commercialization, it still encounters challenges for the large-scale module fabrication, especially for flexible devices which have attracted intensive attention recently. Low-temperature processed high-performance electron-transporting layers (ETLs) are still difficult. Herein, we present a facile low-temperature synthesis of crystalline SnO nanocrystals (NCs) as efficient ETLs for flexible PSCs including modules. Through thermal and UV-ozone treatments of the SnO ETLs, the electron transporting resistance of the ETLs and the charge recombination at the interface of ETL/perovskite were decreased. Thus, the hysteresis-free highly efficient rigid and flexible PSCs were obtained with PCEs of 19.20 and 16.47%, respectively. Finally, a 5 × 5 cm flexible PSC module with a PCE of 12.31% (12.22% for forward scan and 12.40% for reverse scan) was fabricated with the optimized perovskite/ETL interface. Thus, employing presynthesized SnO NCs to fabricate ETLs has showed promising for future manufacturing.
有机-无机金属卤化物钙钛矿太阳能电池（PSCs）作为最有前途的下一代光伏技术之一，其功率转换效率（PCE）已突破 22%。然而，为了实现商业化，其在大规模模块制造方面仍然面临挑战，特别是对于最近受到广泛关注的柔性器件。低温处理的高性能电子传输层（ETL）仍然很困难。在此，我们提出了一种简便的低温合成方法，用于制备高效的 SnO 纳米晶体（NCs）作为柔性 PSCs 包括模块的 ETL。通过 SnO ETL 的热和 UV-臭氧处理，降低了 ETL 的电子传输电阻和 ETL/钙钛矿界面的电荷复合。因此，获得了无滞后的高效刚性和柔性 PSCs，其 PCE 分别为 19.20%和 16.47%。最后，通过优化钙钛矿/ETL 界面，制备了一个 5×5cm 的柔性 PSC 模块，其 PCE 为 12.31%（正向扫描为 12.22%，反向扫描为 12.40%）。因此，采用预先合成的 SnO NCs 来制备 ETL 为未来的制造展示了广阔的前景。
