Synergistic Interface Energy Band Alignment Optimization and Defect Passivation toward Efficient and Simple-Structured Perovskite Solar Cell

doi:10.1002/advs.201902656

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Synergistic Interface Energy Band Alignment Optimization and Defect Passivation toward Efficient and Simple-Structured Perovskite Solar Cell
	Huang, Like ; Zhang, Danli ; Bu, Shixiao ; Peng, Ruixiang ; Wei, Qiang ; Ge, Ziyi
刊名	ADVANCED SCIENCE
	2020
卷号	7 期号:6
关键词	WORK-FUNCTION PHASE
DOI	10.1002/advs.201902656
英文摘要	Efficient electron transport layer-free perovskite solar cells (ETL-free PSCs) with cost-effective and simplified design can greatly promote the large area flexible application of PSCs. However, the absence of ETL usually leads to the mismatched indium tin oxide (ITO)/perovskite interface energy levels, which limits charge transfer and collection, and results in severe energy loss and poor device performance. To address this, a polar nonconjugated small-molecule modifier is introduced to lower the work function of ITO and optimize interface energy level alignment by virtue of an inherent dipole, as verified by photoemission spectroscopy and Kelvin probe force microscopy measurements. The resultant barrier-free ITO/perovskite contact favors efficient charge transfer and suppresses nonradiative recombination, endowing the device with enhanced open circuit voltage, short circuit current density, and fill factor, simultaneously. Accordingly, power conversion efficiency increases greatly from 12.81% to a record breaking 20.55%, comparable to state-of-the-art PSCs with a sophisticated ETL. Also, the stability is enhanced with decreased hysteresis effect due to interface defect passivation and inhibited interface charge accumulation. This work facilitates the further development of highly efficient, flexible, and recyclable ETL-free PSCs with simplified design and low cost by interface electronic structure engineering through facile electrode modification.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20123]
专题	2020专题
作者单位	1.Ge, ZY (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. 2.Ge, ZY (corresponding author), Chinese Acad Sci, NIMTE, Ningbo 315201, Peoples R China.
推荐引用方式 GB/T 7714	Huang, Like,Zhang, Danli,Bu, Shixiao,et al. Synergistic Interface Energy Band Alignment Optimization and Defect Passivation toward Efficient and Simple-Structured Perovskite Solar Cell[J]. ADVANCED SCIENCE,2020,7(6).
APA	Huang, Like,Zhang, Danli,Bu, Shixiao,Peng, Ruixiang,Wei, Qiang,&Ge, Ziyi.(2020).Synergistic Interface Energy Band Alignment Optimization and Defect Passivation toward Efficient and Simple-Structured Perovskite Solar Cell.ADVANCED SCIENCE,7(6).
MLA	Huang, Like,et al."Synergistic Interface Energy Band Alignment Optimization and Defect Passivation toward Efficient and Simple-Structured Perovskite Solar Cell".ADVANCED SCIENCE 7.6(2020).