Ion-modulated radical doping of spiro-OMeTAD for more efficient and stable perovskite solar cells-Reference-Cited by-同舟云学术

Ion-modulated radical doping of spiro-OMeTAD for more efficient and stable perovskite solar cells

Published:2022-07-29 Issue:6605 Volume:377 Page:495-501
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Zhang Tiankai¹^ORCID,Wang Feng¹^ORCID,Kim Hak-Beom²,Choi In-Woo²^ORCID,Wang Chuanfei³^ORCID,Cho Eunkyung⁴^ORCID,Konefal Rafal⁵^ORCID,Puttisong Yuttapoom¹^ORCID,Terado Kosuke⁶,Kobera Libor⁵^ORCID,Chen Mengyun¹^ORCID,Yang Mei¹,Bai Sai¹^ORCID,Yang Bowen⁷⁸^ORCID,Suo Jiajia⁷⁸^ORCID,Yang Shih-Chi⁹,Liu Xianjie³^ORCID,Fu Fan⁹^ORCID,Yoshida Hiroyuki⁶¹⁰^ORCID,Chen Weimin M.¹^ORCID,Brus Jiri⁵^ORCID,Coropceanu Veaceslav⁴^ORCID,Hagfeldt Anders⁷⁸^ORCID,Brédas Jean-Luc⁴^ORCID,Fahlman Mats³^ORCID,Kim Dong Suk²^ORCID,Hu Zhangjun¹^ORCID,Gao Feng¹^ORCID

Affiliation:

1. Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden.

2. Korea Institute of Energy Research (KIER), Ulsan, Republic of Korea.

3. Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 60174 Norrköping, Sweden.

4. Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA.

5. Institute of Macromolecular Chemistry of the Czech Academy of Sciences, 162 06 Prague 6, Czech Republic.

6. Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.

7. Laboratory of Photomolecular Science (LSPM), École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.

8. Department of Chemistry, Ångström Laboratory, Uppsala University, SE-751 20 Uppsala, Sweden.

9. Laboratory for Thin Films and Photovoltaics, Empa–Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Duebendorf, Switzerland.

10. Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.

Abstract

Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have been obtained with the organic hole transporter 2,2′,7,7′-tetrakis( N , N -di- p -methoxyphenyl-amine)9,9′-spirobifluorene (spiro-OMeTAD). Conventional doping of spiro-OMeTAD with hygroscopic lithium salts and volatile 4- tert -butylpyridine is a time-consuming process and also leads to poor device stability. We developed a new doping strategy for spiro-OMeTAD that avoids post-oxidation by using stable organic radicals as the dopant and ionic salts as the doping modulator (referred to as ion-modulated radical doping). We achieved PCEs of >25% and much-improved device stability under harsh conditions. The radicals provide hole polarons that instantly increase the conductivity and work function (WF), and ionic salts further modulate the WF by affecting the energetics of the hole polarons. This organic semiconductor doping strategy, which decouples conductivity and WF tunability, could inspire further optimization in other optoelectronic devices.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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