Efficient organic solar cells using copper(I) iodide (CuI) hole transport layers

Ying Peng, Nir Yaacobi-Gross, Ajay K. Perumal, Hendrik A. Faber, George Vourlias, Panos A. Patsalas, Donal D.C. Bradley, Zhiqun He, Thomas D. Anthopoulos

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53 Scopus citations

Abstract

We report the fabrication of high power conversion efficiency (PCE) polymer/fullerene bulk heterojunction (BHJ) photovoltaic cells using solution-processed Copper (I) Iodide (CuI) as hole transport layer (HTL). Our devices exhibit a PCE value of ∼5.5% which is equivalent to that obtained for control devices based on the commonly used conductive polymer poly(3,4-ethylenedioxythiophene): polystyrenesulfonate as HTL. Inverted cells with PCE >3% were also demonstrated using solution-processed metal oxide electron transport layers, with a CuI HTL evaporated on top of the BHJ. The high optical transparency and suitable energetics of CuI make it attractive for application in a range of inexpensive large-area optoelectronic devices.
Original languageEnglish (US)
Article number243302
JournalApplied Physics Letters
Volume106
Issue number24
DOIs
StatePublished - Jun 15 2015
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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