DataVXACS Applied Energy MaterialsPaper
journal article·2020-02-24

p-Doping of a Hole Transport Material via a Poly(ionic liquid) for over 20% Efficiency and Hysteresis-Free Perovskite Solar Cells

Camille Geffroy, Eftychia Grana, Takeru Bessho, Samy Almosni, Zeguo Tang, Anirudh Sharma, Takumi Kinoshita, Fumiyasu Awai, Eric Cloutet, Thierry Toupance, Hiroshi Segawa, Georges Hadziioannou

ACS Applied Energy Materials· Volume 3· Issue 2
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Source abstract

Abstract

An efficient metal-free formulation of a hole transport material (HTM) based on an ionic liquid polymer is developed for n–i–p perovskite solar cells (PSCs), to address reproducibility issues related to the use of complex dopant mixtures based on lithium salts and cobalt coordination complexes. The conductivity of the HTM is thus significantly improved by 4 orders of magnitude, up to 1.9 × 10–3 S·cm–1, using poly(1-butyl-3-vinylimidazolium bis(trifluoromethylsulfonyl)imide) (PVBI-TFSI) as dopant. Introduced in the FTO/c-TiO2/mp-TiO2/K0.05 (MA0.15FA0.85)0.95PbI2.55Br0.45/HTM/Au PSC configuration, PVBI-TFSI-HTM formulation shows power conversion efficiency as high as 20.3%, versus 18.4% for the standard lithium salt-HTM formulation, with considerably reduced hysteresis and excellent reproducibility. Mechanistic investigations suggest that PVBI-TFSI acts as a source of protons promoting the HTM oxidation.
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Research context

PolymersElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratoire de Chimie des Polymères Organiques, LCPO UMR 5629 CNRS, Université de Bordeaux, Bordeaux INP, Allée Geoffroy Saint-Hilaire, B8, F-33615 Pessac Cedex, France

Institut des Sciences Moléculaires, ISM UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, F-33405 Talence Cedex, France

Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan

Graduate School of Arts and Sciences, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan

Funding

Agence Nationale de la Recherche · New Energy and Industrial Technology Development Organization · Ministry of Economy, Trade and Industry · IDEX Bordeaux

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