Suppressed charge recombination in inverted organic photovoltaics via enhanced charge extraction by using a conductive fullerene electron transport layer

Chang-Zhi Li; Chih-Yu Chang; Yue Zang; Huan-Xin Ju; Chu-Chen Chueh; Po-Wei Liang; Namchul Cho; David S Ginger; Alex K-Y Jen

doi:10.1002/adma.201402276

Suppressed charge recombination in inverted organic photovoltaics via enhanced charge extraction by using a conductive fullerene electron transport layer

Adv Mater. 2014 Sep;26(36):6262-7. doi: 10.1002/adma.201402276. Epub 2014 Aug 4.

Authors

Chang-Zhi Li¹, Chih-Yu Chang, Yue Zang, Huan-Xin Ju, Chu-Chen Chueh, Po-Wei Liang, Namchul Cho, David S Ginger, Alex K-Y Jen

Affiliation

¹ Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.

PMID: 25091210
DOI: 10.1002/adma.201402276

Abstract

Conductive fullerene electron-transporting layers (ETLs) are developed to facilitate the solution processing of highly efficient inverted OSCs with power conversion efficiency (PCE) reaching 9.6%. Its high conductivity also allows devices to be fabricated independently of the ETL thickness (up to ca. 50 nm). Transient photovoltage (TPV) measurements are used to shed light on how these conductive ETLs help suppress charge recombination in solar cells.

Keywords: Inverted organic solar cell; electron transport layer; fullerene; recombination; transient photovoltage.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.