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Durham University

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Publication details for Professor Andy Monkman

P. Data, M. Bialoglowski, K. Lyzwa, R. Bacewicz, P. Dluzewski, M. Lapkowski, T. Gregorkiewicz, S. Podsiadlo & A.P. Monkman (2016). Kesterite Inorganic-Organic Heterojunction for Solution Processable Solar Cells. Electrochimica Acta 201: 78-85.

Author(s) from Durham

Abstract

New synthesis of solution processable kesterite and kesterite-phenoxazine nanopowders were presented. The direct band-gap semiconductor Cu2ZnSnS4 has attracted the attention of many due to its large absorption coefficient (alpha > 10(4) cm(-1)) and (optical) band-gap energy close to the optimal value for solar light conversion (1.4-1.6 eV). The presence of a kesterite nanocrystal structure has been investigated and confirmed by (HR) TEM, X-ray powder diffraction, EDX and EXAFS measurements. Low-temperature photoluminescence (PL) measurements indicate the absence of PL in the Cu2ZnSnS4 nanocrystals. Electrochemical studies helped to prove that an inorganic-organic heterojunction of nanokesterite-phenoxazine was obtained. Device studies showed a two fold improvement in efficiency upon addition of a kesterite or phenoxazines-kesterite layer. (C) 2016 Elsevier Ltd. All rights reserved.