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Decoupling Interfacial Charge Transfer from Bulk Diffusion Unravels Its Intrinsic Role for Efficient Charge Extraction in Perovskite Solar Cells
Leng, Jing1,2; Liu, Junxue1,2,3; Zhang, Jun3; Jin, Shengye1,2
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY LETTERS
2016-12-15
DOI10.1021/acs.jpclett.6b02309
Volume7Issue:24Pages:5056-5061
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordLEAD IODIDE PEROVSKITE ; ORGANOMETAL HALIDE PEROVSKITES ; SPIRO-OMETAD ; RECOMBINATION DYNAMICS ; NANOCRYSTALLINE TIO2 ; CARRIER DIFFUSION ; SINGLE-CRYSTALS ; QUANTUM DOTS ; ELECTRON ; CH3NH3PBI3
AbstractIn a perovskite solar cell, the overall photoinduced charge-transfer (CT) process comprises both charge diffusion through the bulk to perovskite/electrode interfaces and interfacial electron and hole transfer to electrodes. In this study, we decoupled these two entangled processes by investigating the film thickness-dependent CT dynamics from CH3NH3PbI3 perovskites to [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) (electron acceptor) and spiro-OMeTAD (hole acceptor). By fitting ultrafast transient absorption kinetics to an explicit "diffusion-coupled charge-transfer" model, we found that the charge diffusion from the film interior to perovskite/electrode interfaces took similar to 200 ps to a few nanoseconds, depending on the thickness of perovskite film; the subsequent interfacial charge transfer was ultrafast, similar to 6 ps for electron transfer to PCBM and similar to 8ps for hole transfer to Spiro-OMeTAD, and led to efficient charge extraction (>90%) to electrodes in a 400 nm thick film. Our results indicate that the picosecond interfacial charge transfer is a key to high-performance perovskite solar cells.
Language英语
WOS IDWOS:000390087000016
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/151820
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat IChEM, Dalian 116023, Peoples R China
3.China Univ Petr, Coll Chem Engn, State Key Lab Heavy Oil Proc, 66 Changjiang West Rd, Qingdao 266580, Peoples R China
Recommended Citation
GB/T 7714
Leng, Jing,Liu, Junxue,Zhang, Jun,et al. Decoupling Interfacial Charge Transfer from Bulk Diffusion Unravels Its Intrinsic Role for Efficient Charge Extraction in Perovskite Solar Cells[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2016,7(24):5056-5061.
APA Leng, Jing,Liu, Junxue,Zhang, Jun,&Jin, Shengye.(2016).Decoupling Interfacial Charge Transfer from Bulk Diffusion Unravels Its Intrinsic Role for Efficient Charge Extraction in Perovskite Solar Cells.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,7(24),5056-5061.
MLA Leng, Jing,et al."Decoupling Interfacial Charge Transfer from Bulk Diffusion Unravels Its Intrinsic Role for Efficient Charge Extraction in Perovskite Solar Cells".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 7.24(2016):5056-5061.
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