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ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20%
Jiang, Jiexuan1; Jin, Zhiwen1; Lei, Jie1; Wang, Qian1; Zhang, Xisheng1; Zhang, Jingru1; Gao, Fei1; Liu, Shengzhong (Frank)1,2
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
2017-05-28
DOI10.1039/c7ta01636k
Volume5Pages:9514-9522
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS KeywordPERFORMANCE ; TIO2 ; MONOLAYER ; FABRICATION ; UNDERLAYER ; STABILITY ; DEVICES ; POLYMER ; FILMS
AbstractThe 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.
Language英语
WOS IDWOS:000401930100004
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/152302
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Jiang, Jiexuan.,Jin, Zhiwen.,Lei, Jie.,Wang, Qian.,Zhang, Xisheng.,...&Liu, Shengzhong .(2017).ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20%.JOURNAL OF MATERIALS CHEMISTRY A,5,9514-9522.
MLA Jiang, Jiexuan,et al."ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20%".JOURNAL OF MATERIALS CHEMISTRY A 5(2017):9514-9522.
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