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

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...

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Bibliographic Details
Published in:Applied physics letters 2015-06, Vol.106 (24)
Main Authors: Peng, Ying, Yaacobi-Gross, Nir, Perumal, Ajay K., Faber, Hendrik A., Vourlias, George, Patsalas, Panos A., Bradley, Donal D. C., He, Zhiqun, Anthopoulos, Thomas D.
Format: Article
Language:English
Subjects:
Applied physics
CHARGE TRANSPORT
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COPPER
COPPER IODIDES
Cuprous iodide
EFFICIENCY
Electron transport
Energy conversion efficiency
FABRICATION
FULLERENES
HETEROJUNCTIONS
LAYERS
MATERIALS SCIENCE
OPTOELECTRONIC DEVICES
Organic chemistry
ORGANIC SOLAR CELLS
OXIDES
Photovoltaic cells
POLYMERS
Solar cells
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4922758