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Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells

文献类型:期刊论文

作者Li, Can3; Liu, Shengzhong (Frank)1,3; Chang, Robert P. H.4; Yang, Ruixia3; Yang, Zhou1; Yu, Wei3; Wang, Xiuli3; Zhou, Xin2; Yang, Dong1
刊名ENERGY & ENVIRONMENTAL SCIENCE
出版日期2016
卷号9期号:10页码:3071-3078
ISSN号1754-5692
DOI10.1039/c6ee02139e
文献子类Article
英文摘要The electron-transport layer (ETL) between the active perovskite material and the cathode plays a critical role in planar perovskite solar cells. Herein, we report a drastically improved solar cell efficiency via surface optimization of the TiO2 ETL using a special ionic-liquid (IL) that shows high optical transparency and superior electron mobility. As a consequence, the efficiency is promoted to as high as 19.62% (the certified efficiency is 19.42%), exceeding the previous highest efficiency recorded for planar CH3NH3PbI3 perovskite solar cells. Surprisingly, the notorious hysteresis is completely eliminated, likely due to the improved ETL quality that has effectively suppressed ion migration in the perovskite layer and charge accumulation at the interfaces, higher electron mobility to balance the hole flux at the anode, and a better growth platform for the high quality perovskite absorber. Both experimental analyses and theoretical calculations reveal that the anion group of the IL bonds to TiO2, leading to a higher electron mobility and a wellmatched work function. Meanwhile, the cation group interfaces with adjacent perovskite grains to provide an effective channel for electron transport and a suitable setting to grow low trap-state density perovskite for improved device performance.
WOS关键词POWER CONVERSION EFFICIENCY ; HALIDE PEROVSKITES ; FILMS ; TIO2 ; LAYER ; CRYSTALLIZATION ; EXTRACTION ; DEPOSITION ; STABILITY ; PRECURSOR
WOS研究方向Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000386336200007
出版者ROYAL SOC CHEMISTRY
源URL[http://cas-ir.dicp.ac.cn/handle/321008/169958]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Li, Can; Liu, Shengzhong (Frank)
作者单位1.Shaanxi Normal Univ, Natl Minist Educ, Shaanxi Engn Lab Adv Energy Technol, Sch Mat Sci & Engn,Key Lab Appl Surface & Colloid, Xian 710119, Peoples R China
2.Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
4.Northwestern Univ, ANSER Ctr, Dept Mat Sci & Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA
推荐引用方式
GB/T 7714
Li, Can,Liu, Shengzhong ,Chang, Robert P. H.,et al. Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells[J]. ENERGY & ENVIRONMENTAL SCIENCE,2016,9(10):3071-3078.
APA Li, Can.,Liu, Shengzhong .,Chang, Robert P. H..,Yang, Ruixia.,Yang, Zhou.,...&Yang, Dong.(2016).Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells.ENERGY & ENVIRONMENTAL SCIENCE,9(10),3071-3078.
MLA Li, Can,et al."Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells".ENERGY & ENVIRONMENTAL SCIENCE 9.10(2016):3071-3078.

入库方式: OAI收割

来源:大连化学物理研究所

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