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- Title
In Situ Photocatalytically Heterostructured ZnOAg Nanoparticle Composites as Effective Cathode-Modifying Layers for Air-Processed Polymer Solar Cells.
- Authors
Yuan, Kai; Chen, Lie; Chen, Yiwang
- Abstract
A heterostructured semiconductor-metal ZnOAg nanoparticle (NP) composite was constructed through a straightforward photocatalytic strategy by using UV irradiation of ZnO NPs and an aqueous solution of Ag precursor. The ZnOAg NP composites serve as an effective cathode-modifying layer in polymer solar cells (PSCs) with increased short-circuit current density owing to the light-trapping effect, and improved optical and electrical conductivity properties compared with pure ZnO NPs. The Ag NPs, which are photodeposited in situ on ZnO NPs, can act as effective antennas for incident light to maximize light harvesting and minimize radiative decay or nonradiative losses, consequently resulting in the enhanced photogeneration of excitons in PSCs. Systematic photoelectron and -physical investigations confirm that heterostructured ZnOAg NPs can significantly improve charge separation, transport, and collection, as well as lower charge recombination at the cathode interface, leading to a 14.0 % improvement in air-processed device power conversion efficiency. In addition, this processable, cost-effective, and scalable approach is compatible with roll-to-roll manufacturing of large-scale PSCs.
- Subjects
SILVER nanoparticles; SEMICONDUCTOR-metal boundaries; PHOTOCATALYTIC oxidation; IRRADIATION; SOLAR cells; AQUEOUS solutions; ELECTRON cloud effect
- Publication
Chemistry - A European Journal, 2015, Vol 21, Issue 33, p11899
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201405073