4.7 Article

Solution processed n-type mixed metal oxide layer for electron extraction in inverted polymer solar cells

Journal

SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 125, Issue -, Pages 276-282

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2014.03.012

Keywords

Bulk heterojunction; Solution processed; Electron transport layer; Metal oxide layer

Funding

  1. National Research Foundation of Korea - Korean Government (MEST) [NRF-2009-0093323]
  2. Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea Government Ministry of Trade, Industry and Energy [20134010200490]

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In this paper we demonstrate an efficient inverted polymer bulk heterojunction (BHJ) solar cells using solution processed interfacial layer by mixing zinc oxide (ZnO) with cesium carbonate (Cs2CO3) for ideal electron extraction and transport. The optimized inverted BHJ solar cell with n-type mixed (ZnO:Cs2CO3) electron transport layer and blend of poly (3-hexylthiophene):Indene-C60 bisadduct as a photoactive layer shows a power conversion efficiency as high as 5.29%. This performance enhancement is attributed to improved interfacial contact between photoactive layer and electron extraction layer, low leakage current, and a suitable surface morphology for electron extraction and transport. (C) 2014 Elsevier B.V. All rights reserved.

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