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A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I
Ye, SY; Rao, HX; Zhao, ZR; Zhang, LJ; Bao, HL; Sun, WH; Li, YL; Gu, FD; Wang, JQ; Liu, ZW; Bian, ZQ; Huang, CH
2017
Source PublicationJOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN0002-7863
Volume139Issue:22Pages:7504-7512
Subtype期刊论文
AbstractIt is extremely significant to study the trap state passivation and minimize the trap states of perovskite to achieve high-performance perovskite solar cells (PSCs). Here, we have first revealed and demonstrated that a novel p-type conductor Cu(thiourea)I [Cu(Tu)I] incorporated in perovskite layer can effectively passivate the trap states of perovskite via interacting with the under-coordinated metal cations and halide anions at the perovskite crystal surface. The trap state energy level of perovskite can be shallowed from 0.35-0.45 eV to 0.25-0.35 eV. In addition, the incorporated Cu(Tu)I can participate in constructing the p-i bulk heterojunctions with perovskite, leading to an increase of the depletion width from 126 to 265 nm, which is advantageous for accelerating hole transport and reducing charge carrier recombination. For these two synergistic effects, Cu(Tu)I can play a much better role than that of the traditional p-type conductor CuI, probably due to its identical valence band maximum with that of perovskite, which enables to not only lower the trap state energy level to a greater extent but also eliminate the potential wells for holes at the p-i heterojunctions. After optimization, a breakthrough efficiency of 19.9% has been obtained in the inverted PSCs with Cu(Tu)I as the trap state passivator of perovskite.
KeywordLead Iodide Perovskites Hole-conductor-free Halide Perovskites Transporting Layer Photovoltaic Cells Low-temperature Fill-factor Thin-films Planar Performance
DOI10.1021/jacs.7b01439
WOS KeywordLEAD IODIDE PEROVSKITES ; HOLE-CONDUCTOR-FREE ; HALIDE PEROVSKITES ; TRANSPORTING LAYER ; PHOTOVOLTAIC CELLS ; LOW-TEMPERATURE ; FILL-FACTOR ; THIN-FILMS ; PLANAR ; PERFORMANCE
Indexed BySCI
Language英语
WOS IDWOS:000403136500013
Citation statistics
Cited Times:66[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28539
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Ye, SY,Rao, HX,Zhao, ZR,et al. A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(22):7504-7512.
APA Ye, SY.,Rao, HX.,Zhao, ZR.,Zhang, LJ.,Bao, HL.,...&Huang, CH.(2017).A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(22),7504-7512.
MLA Ye, SY,et al."A Breakthrough Efficiency of 19.9% Obtained in Inverted Perovskite Solar Cells by Using an Efficient Trap State Passivator Cu(thiourea)I".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.22(2017):7504-7512.
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