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Inverted perovskite solar cells with air stable diketopyrrolopyrrole-based electron transport layer

Sharma, Shikha and Sakai, Nobuya and Ray, Suman and Senanayak, Satyaprasad P and Sirringhaus, Henning and Snaith, Henry J and Patil, Satish (2019) Inverted perovskite solar cells with air stable diketopyrrolopyrrole-based electron transport layer. In: SOLAR ENERGY, 186 . pp. 9-16.

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Official URL: https://doi.org/10.1016/j.solener.2019.04.071

Abstract

One of the possible causes of degradation of perovskite solar cells is the instability of the electron transporting layer. In this regard, design of air stable electron transport organic semiconductors, compatible with perovskite energy levels presents challenges due to inherent vulnerability to traps, presumably originating due to water and/or oxygen. In this work, we demonstrate air stability of diketopyrrolopyrrole-based molecule (TDPP-CN4) at ambient conditions and its application as electron transporting layer (ETL) in perovskite solar cells. We investigated electron mobility and air stability of TDPP-CN4 by fabricating top-gate bottom-contact (TG-BC) thin film transistors and compared with PCBM at ambient conditions. Both TDPP-CN4 and PCBM exhibit electron transport properties with mobility of 0.13 cm(2) V-1 s(-1) and 0.03 cm(2) V-1 s(-1) respectively. However, we found remarkable air stability of the TDPP-CN4 in the OFET measurements under ambient conditions. These excellent properties of TDPP-CN4 render them as potential ETL layer in inverted planar heterojunction perovskite solar cells. Our preliminary device studies show remarkable short-circuit current (J(sc)) similar to 17.4 mA/cm(2) with moderate open-circuit voltage (V-oc) of 0.50 V. These results suggest that the electron mobility and air-stability of diketopyrrolopyrrole-based molecule hold a promise as Ell in perovskite solar cells at ambient conditions.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords: Diketopyrrolopyrrole; Perovskite solar cells
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 28 Jun 2019 08:03
Last Modified: 28 Jun 2019 08:03
URI: http://eprints.iisc.ac.in/id/eprint/63117

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