CaltechAUTHORS
Published September 20, 2017 | Version Supplemental Material
Journal Article Open

Molecular Engineered Hole-Extraction Materials to Enable Dopant-Free, Efficient p-i-n Perovskite Solar Cells

Creators

  • 1. ROR icon Zhejiang University
  • 2. ROR icon California Institute of Technology
  • 3. ROR icon City University of Hong Kong

Abstract

Two hole-extraction materials (HEMs), TPP-OMeTAD and TPP-SMeTAD, have been developed to facilitate the fabrication of efficient p-i-n perovskite solar cells (PVSCs). By replacing the oxygen atom on HEM with sulfur (from TPP-OMeTAD to TPP-SMeTAD), it effectively lowers the highest occupied molecular orbital of the molecule and provides stronger Pb-S interaction with perovskites, leading to efficient charge extraction and surface traps passivation. The TPP-SMeTAD-based PVSCs exhibit both improved photovoltaic performance and reduced hysteresis in p-i-n PVSCs over those based on TPP-OMeTAD. This work not only provides new insights on creating perovskite-HEM heterojunction but also helps in designing new HEM to enable efficient organic–inorganic hybrid PVSCs.

Additional Information

© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Version of record online: 12 May 2017; Manuscript Revised: 19 March 2017; Manuscript Received: 2 January 2017. H.C. and W.F. contributed equally to this work. This research was funded by National Natural Science Foundation of China (Nos. 51473142, 21674093, and 51620105006), 973 program (No. 2014CB643503), and International Science and Technology Cooperation Program of China (ISTCP) (Grant No. 2016YFE0102900). C.-Z.L. thanks the support by the Young 1000 Talents Global Recruitment Program of China and 100 Talents Program of Zhejiang University. A.K.-Y.J. thanks the Boeing-Johnson Foundation for its support. The authors declare no conflict of interest.

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Additional details

Identifiers

Eprint ID
77409
DOI
10.1002/aenm.201700012
Resolver ID
CaltechAUTHORS:20170512-105618299

Funding

National Natural Science Foundation of China
51473142
National Natural Science Foundation of China
21674093
National Natural Science Foundation of China
51620105006
973 Program
2014CB643503
International Science and Technology Cooperation Program of China (ISTCP)
2016YFE0102900
Young 1000 Talents Global Recruitment Program of China
Zhejiang University
Boeing-Johnson Foundation

Dates

Created
2017-05-12
Created from EPrint's datestamp field
Updated
2021-11-15
Created from EPrint's last_modified field