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Proceedings Paper

Polymer solar cells with efficiency >10% enabled via a facile solution-processed Al-doped ZnO electron transporting layer (Presentation Recording)
Author(s): Lethy K. Jagadamma; Mohammed Al-Senani; Aram Amassian
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Paper Abstract

The present work details a facile and low-temperature (125C) solution-processed Al-doped ZnO (AZO) buffer layer functioning very effectively as electron accepting/hole blocking layer for a wide range of polymer:fullerene bulk heterojunction systems, and yielding power conversion efficiency in excess of 10% (8%) on glass (plastic) substrates. We show that ammonia addition to the aqueous AZO nanoparticle solution is a critically important step toward producing compact and smooth thin films which partially retain the aluminum doping and crystalline order of the starting AZO nanocrystals. The ammonia treatment appears to reduce the native defects via nitrogen incorporation, making the AZO film a very good electron transporter and energetically matched with the fullerene acceptor. Importantly, highly efficient solar cells are achieved without the need for additional surface chemical passivation or modification, which has become an increasingly common route to improving the performance of evaporated or solution-processed ZnO ETLs in solar cells.

Paper Details

Date Published: 12 October 2015
PDF: 1 pages
Proc. SPIE 9567, Organic Photovoltaics XVI, 956719 (12 October 2015); doi: 10.1117/12.2189025
Show Author Affiliations
Lethy K. Jagadamma, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Mohammed Al-Senani, King Abdullah Univ. of Science and Technology (Saudi Arabia)
Aram Amassian, King Abdullah Univ. of Science and Technology (Saudi Arabia)

Published in SPIE Proceedings Vol. 9567:
Organic Photovoltaics XVI
Zakya H. Kafafi; Paul A. Lane; Ifor D. W. Samuel, Editor(s)

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