High efficiency air stable organic photovoltaics with an aqueous inorganic contact

K. D. G. Imalka Jayawardena; Siying Li; Laurent F. Sam; Christopher T. G. Smith; Michail J. Beliatis; Keyur K. Gandhi; M. R. Ranga Prabhath; Thomas R. Pozegic; Sujie Chen; Xiaoli Xu; G. Dinesha M. R. Dabera; Lynn J. Rozanski; Radu A. Sporea; Christopher A. Mills; Xiaojun Guo; S. Ravi P. Silva

doi:10.1039/C5NR01239B

High efficiency air stable organic photovoltaics with an aqueous inorganic contact†

K. D. G. Imalka Jayawardena,^a Siying Li,^b Laurent F. Sam,^a Christopher T. G. Smith,^a Michail J. Beliatis,^a Keyur K. Gandhi,^a M. R. Ranga Prabhath,^a Thomas R. Pozegic,^a Sujie Chen,^b Xiaoli Xu,^b G. Dinesha M. R. Dabera,^a Lynn J. Rozanski,^a Radu A. Sporea,^a Christopher A. Mills,^a Xiaojun Guo*^b and S. Ravi P. Silva*^b

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^a Advanced Technology Institute, University of Surrey, Guildford, Surrey, UK
E-mail: s.silva@surrey.ac.uk
Fax: +44 (0)1483 68 6081
Tel: +44 (0)1483 68 9825

^b National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
E-mail: x.guo@sjtu.edu.cn
Fax: +86 02134207734
Tel: +86 02134207734

Abstract

We report a ZnO interfacial layer based on an environmentally friendly aqueous precursor for organic photovoltaics. Inverted PCDTBT devices based on this precursor show power conversion efficiencies of 6.8–7%. Unencapsulated devices stored in air display prolonged lifetimes extending over 200 hours with less than 20% drop in efficiency compared to devices based on the standard architecture.

Nanoscale

High efficiency air stable organic photovoltaics with an aqueous inorganic contact†

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