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题名: ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20%
作者: Jiang, Jiexuan1;  Jin, Zhiwen1;  Lei, Jie1;  Wang, Qian1;  Zhang, Xisheng1;  Zhang, Jingru1;  Gao, Fei1;  Liu, Shengzhong (Frank)1, 2
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2017-05-28
DOI: 10.1039/c7ta01636k
卷: 5, 页:9514-9522
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: The electron transport layer (ETL), which also serves as the hole-blocking layer, is a key component in planar perovskite solar cells (PSCs). The commonly used ETL is an anatase-TiO2 (an-TiO2) film due to its excellent optical transmittance, chemical stability and semi-conducting characteristics. Nevertheless, its rough surface and plenty of surface defects often lead to a substandard perovskite film and large J-V hysteresis. Herein, a novel low-trap-density ETL is developed by surface modification of the an-TiO2 film using small-molecular ITIC. As a result, the device efficiency has been dramatically increased from 17.12% to 20.08%, entering the league of the highest planar-type perovskite cells. Moreover, the J-V hysteresis has been significantly reduced. Further investigation shows that the ITIC smoothens the TiO2 surface, passivates defects or dangling bands parasitizing the TiO2 surface, and optimizes the device band alignment. In addition, it is demonstrated that the thin ITIC promotes the formation of high quality, uniform perovskite films with better surface coverage and large grain size, implying that there is a synergistic effect between the low-trap-density ITIC and high-mobility TiO2 in improved PSC performance.
关键词[WOS]: PERFORMANCE ;  TIO2 ;  MONOLAYER ;  FABRICATION ;  UNDERLAYER ;  STABILITY ;  DEVICES ;  POLYMER ;  FILMS
语种: 英语
WOS记录号: WOS:000401930100004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152302
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Shaanxi Normal Univ, Sch Mat Sci & Engn, Shaanxi Engn Lab Adv Energy Technol,Shaanxi Key L, Key Lab Appl Surface & Colloid Chem,Natl Minist E, Xian 710119, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, iChEM, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Jiang, Jiexuan,Jin, Zhiwen,Lei, Jie,et al. ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20%[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5:9514-9522.
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