Key Laboratory of Luminescence and Optical Information (Ministry of Education) , Beijing Jiaotong University , Beijing 100044 , China.
Department of Chemical and Environmental Engineering , Yale University , New Haven , Connecticut 06511 , United States.
ACS Appl Mater Interfaces. 2018 Aug 1;10(30):25329-25336. doi: 10.1021/acsami.8b05949. Epub 2018 Jul 20.
The successful commercialization of perovskite solar cells (Pvs-SCs) calls for the need to find low-temperature processable interlayers with outstanding charge-transport features. In this work, we strategically blend poly(2-ethyl-2-oxazoline) (PEOz) with PEDOT:PSS as the modified hole transport layer (HTL) to achieve high-efficiency P-I-N CHNHPbI Pvs-SCs. The PEOz-PEDOT:PSS HTL exhibits enhanced features over the conventional layer including the following: (1) promoting perovskite with enlarged grain sizes to decrease the perovskite layer's recombination, (2) increasing the work function of the HTL, and (3) decreasing the noncapacitive current in Pvs-SCs. Remarkably, we demonstrate a 17.39% power conversion efficiency with very low hysteresis and high V values of 1.075 V for Pvs-SCs with PEOz-PEDOT:PSS.
钙钛矿太阳能电池（Pvs-SCs）的商业化成功需要寻找具有出色电荷传输性能的低温处理层。在这项工作中，我们策略性地将聚（2-乙基-2-恶唑啉）（PEOz）与PEDOT：PSS 混合作为改性空穴传输层（HTL），以实现高效的 P-I-N CHNHPbI Pvs-SCs。PEOz-PEDOT：PSS HTL 相对于传统层具有以下增强特性：（1）促进钙钛矿生长，增大晶粒尺寸，降低钙钛矿层的复合，（2）增加 HTL 的功函数，（3）降低 Pvs-SCs 中的非电容电流。值得注意的是，我们展示了一种 17.39%的功率转换效率，具有非常低的滞后和高的 V 值为 1.075 V 的 PEOz-PEDOT：PSS 钙钛矿太阳能电池。
