Efficient solution-processed small-molecule solar cells with inverted structure

Aung Ko Ko Kyaw; Dong Hwan Wang; Vinay Gupta; Jie Zhang; Suresh Chand; Guillermo C Bazan; Alan J Heeger

doi:10.1002/adma.201300295

Efficient solution-processed small-molecule solar cells with inverted structure

Adv Mater. 2013 May 7;25(17):2397-402. doi: 10.1002/adma.201300295. Epub 2013 Mar 1.

Authors

Aung Ko Ko Kyaw¹, Dong Hwan Wang, Vinay Gupta, Jie Zhang, Suresh Chand, Guillermo C Bazan, Alan J Heeger

Affiliation

¹ Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106-5090, USA.

PMID: 23450514
DOI: 10.1002/adma.201300295

Abstract

We successfully demonstrate inverted structure small-molecule (SM) solar cells with an efficiency of 7.88% using ZnO and PEIE as an interfacial layer. Modification of ZnO with a cost-effective PEIE thin layer increases the efficiency of the inverted cell as a result of reducing the work function of the cathode and suppressing the trap-assisted recombination. In addition to the high efficiency, the inverted SM solar cells are relatively stable in air compared to conventional cells.

Publication types

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

MeSH terms

Adsorption
Electric Power Supplies*
Electrodes*
Energy Transfer
Equipment Design
Equipment Failure Analysis
Materials Testing
Molecular Conformation
Polyethyleneimine / analogs & derivatives*
Polyethyleneimine / chemistry
Solar Energy*
Solutions
Zinc Oxide / chemistry*

Substances

Solutions
hydroxyethylated polyethyleneimine
Polyethyleneimine
Zinc Oxide