Colloidal SnO2-Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells

Zhou, Juntian1; Zhou, Ru1; Zhu, Jun2; Jiang, Ping1; Wan, Lei1; Niu, Haihong1; Hu, Linhua3; Yang, Xi1; Xu, Jinzhang1; Xu, Baomin4

2021-08-01

10.1002/solr.202100494

Solar RRL   影响因子和分区

2367-198X

The cadmium sulfide (CdS) is a promising electron transport layer (ETL) material for perovskite solar cells (PSCs) due to its low photocatalytic activity toward perovskite materials under UV light. The critical problem responsible for the moderate performance of CdS-based PSCs is the parasitic light absorption of CdS, which drives researchers to deposit ultrathin ETLs. However, the ultrathin ETL often involves the undesirable shunt current leakage because of the direct contact between conducting substrate and perovskite layer. Herein, a fully low-temperature solution-processed colloidal SnO2-assisted CdS (S-CdS) ETL for planar CH3NH3PbI3 PSCs is constructed. The detailed characterizations of morphological, optical, and energy levels confirm that the assistance of colloidal SnO2 provides the ameliorated continuity, reduces surface roughness and superior wettability of ETLs for high-quality perovskite formation as well as the favorable cascade band structure for efficient charge transfer. The study of charge transfer mechanisms reveals that the S-CdS ETL effectively inhibits the shunt leakage, promotes the electron extraction and suppresses the charge recombination at the ETL/perovskite interface. Consequently, the S-CdS ETL-based PSCs deliver an appreciable efficiency of 16.26%, doubling that of conventional CdS-based devices. To the best of our knowledge, this value is the champion efficiency reported for CdS-based CH3NH3PbI3 PSCs.

CdS electron transport layers low temperature perovskite solar cells SnO2

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51602088,51802067,"U19A2089"] ; National Key R&D Program of China[2017YFE0133800] ; Open Fund of the Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences[PECL2019KF007] ; Fundamental Research Funds for the Central Universities[JZ2020HGTB0057]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000682722700001

WILEY-V C H VERLAG GMBH

20213210747463

Cadmium sulfide ; Charge transfer ; Electron transport properties ; Extraction ; II-VI semiconductors ; Lead compounds ; Light absorption ; Perovskite ; Photocatalytic activity ; Sols ; Sulfur compounds ; Surface roughness ; Temperature

Minerals:482.2 ; Thermodynamics:641.1 ; Light/Optics:741.1 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2

Web of Science

1.Hefei Univ Technol, Sch Elect Engn & Automat, Hefei 230009, Peoples R China
2.Hefei Univ Technol, Acad Optoelect Technol, Special Display & Imaging Technol Innovat Ctr Anh, Hefei 230009, Peoples R China
3.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Zhou, Juntian,Zhou, Ru,Zhu, Jun,et al. Colloidal SnO2-Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells[J]. Solar RRL,2021,5.

Zhou, Juntian.,Zhou, Ru.,Zhu, Jun.,Jiang, Ping.,Wan, Lei.,...&Xu, Baomin.(2021).Colloidal SnO2-Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells.Solar RRL,5.

Zhou, Juntian,et al."Colloidal SnO2-Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells".Solar RRL 5(2021).