Volume 58, Issue 33 pp. 11266-11272
Communication

Inexpensive Hole-Transporting Materials Derived from Tröger's Base Afford Efficient and Stable Perovskite Solar Cells

Titas Braukyla

Titas Braukyla

Department of Organic Chemistry, Kaunas University of Technology, Radvilenu pl. 19, 50254 Kaunas, Lithuania

These authors contributed equally to this work.

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Rui Xia

Rui Xia

Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Rue de l'Industry 17, 1951 Sion, Switzerland

These authors contributed equally to this work.

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Maryte Daskeviciene

Maryte Daskeviciene

Department of Organic Chemistry, Kaunas University of Technology, Radvilenu pl. 19, 50254 Kaunas, Lithuania

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Tadas Malinauskas

Tadas Malinauskas

Department of Organic Chemistry, Kaunas University of Technology, Radvilenu pl. 19, 50254 Kaunas, Lithuania

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Alytis Gruodis

Alytis Gruodis

Institute of Chemical Physics, Vilnius University, Sauletekio al.3, Vilnius, 10257 Lithuania

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Vygintas Jankauskas

Vygintas Jankauskas

Institute of Chemical Physics, Vilnius University, Sauletekio al.3, Vilnius, 10257 Lithuania

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Zhaofu Fei

Zhaofu Fei

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland

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Cristina Momblona

Cristina Momblona

Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Rue de l'Industry 17, 1951 Sion, Switzerland

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Cristina Roldán-Carmona

Cristina Roldán-Carmona

Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Rue de l'Industry 17, 1951 Sion, Switzerland

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Paul J. Dyson

Paul J. Dyson

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland

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Vytautas Getautis

Corresponding Author

Vytautas Getautis

Department of Organic Chemistry, Kaunas University of Technology, Radvilenu pl. 19, 50254 Kaunas, Lithuania

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Mohammad Khaja Nazeeruddin

Corresponding Author

Mohammad Khaja Nazeeruddin

Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Rue de l'Industry 17, 1951 Sion, Switzerland

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First published: 04 June 2019
Citations: 43

Graphical Abstract

Three enamine hole-transporting materials (HTMs) based on Tröger's base scaffold were synthesized. These compounds are obtained in a three-step facile synthesis from commercially available materials without the need of expensive catalysts, inert conditions or time-consuming purification steps.

Abstract

The synthesis of three enamine hole-transporting materials (HTMs) based on Tröger's base scaffold are reported. These compounds are obtained in a three-step facile synthesis from commercially available materials without the need of expensive catalysts, inert conditions or time-consuming purification steps. The best performing material, HTM3, demonstrated 18.62 % PCE in PSCs, rivaling spiro-OMeTAD in efficiency, and showing markedly superior long-term stability in non-encapsulated devices. In dopant-free PSCs, HTM3 outperformed spiro-OMeTAD by a factror of 1.6. The high glass-transition temperature (Tg=176 °C) of HTM3 also suggests promising perspectives in device applications.

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