Affiliation:
1. Department of Electrical and Electronics Engineering, Aichi Institute of Technology, 1247, Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
Abstract
As one of the most significant components of perovskite solar cells, the perovskite light absorbing layer demands high quality to guarantee extraordinary power conversion efficiency (PCE). We have fabricated series of CH3NH3PbI3 perovskite solar cells
by virtue of gas-flowing assisting (GFA), spin coating twice for the PbI2 layer and dipping the semi-samples in a thermal CH3NH3I solution, by which some undesirable perovskite morphologies can be effectively avoided. The modified conductions have also dramatically
improved the perovskite layer and elevated the coverage ratio from 53.6% to 79.5%. All the fabrication processes, except the steps for deposition of the hole transport material (HTM) and back gold electrode, have been conducted in air and an average PCE of 6.6% has been achieved by initiatively
applying N,N′-bis(1-naphtyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (α-NPD) doped by MoO3 as HTM. The CH3NH3PbI3 perovskite’s morphology and its coverage ratio to the underneath TiO2
mesoporic layer are evaluated to account for the cells’ performance. It has demonstrated that higher homogeneity and coverage ratio of the CH3NH3PbI3 layer have most significantly contributed to the solar cells’ light conversion efficiency.
Publisher
American Scientific Publishers
Subject
Condensed Matter Physics,General Materials Science,Biomedical Engineering,General Chemistry,Bioengineering
Cited by
12 articles.
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