博彩平台

Qingqing Dong^a ,  Zhaowei Wang^a,   Kaicheng Zhang^a ,  Hao Yu^a,   Peng Huang^a,   Xiaodong Liu^a,   Yi Zhou*^a（周祎）,  Ning Chen*^a （谌宁）and   Bo Song*^a（宋波）

^a Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University

Nanoscale, 2016,8, 5552-5558

For perovskite solar cells (Pero-SCs), one of the key issues with respect to the power conversion efficiency (PCE) is the morphology control of the perovskite thin-films. In this study, an easily-accessible additive polyethylenimine (PEI) is utilized to tune the morphology of CH₃NH₃PbI_3−xCl_x. With addition of 1.00 wt% of PEI, the smoothness and crystallinity of the perovskite were greatly improved, which were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). A summit PCE of 14.07% was achieved for the p-i-n type Pero-SC, indicating a 26% increase compared to those of the devices without the additive. Both photoluminescence (PL) and alternating current impedance spectroscopy (ACIS) analyses confirm the efficiency results after the addition of PEI. This study provides a low-cost polymer additive candidate for tuning the morphology of perovskite thin-films, and might be a new clue for the mass production of Pero-SCs.

链接：//pubs.rsc.org/en/content/articlelanding/2016/nr/c6nr00206d#!divAbstract