Post-Assembly Atomic Layer Deposition of Ultrathin Metal-Oxide Coatings Enhances the Performance of an Organic Dye-Sensitized Solar Cell by Suppressing Dye Aggregation
- Authors
- Son, Ho-Jin; Kim, Chul Hoon; Kim, Dong Wook; Jeong, Nak Cheon; Prasittichai, Chaiya; Luo, Langli; Wu, Jinsong; Farha, Omar K.; Wasielewski, Michael R.; Hupp, Joseph T.
- Issue Date
- 11-3월-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- dye-sensitized solar cells (DSCs); atomic layer deposition (ALD); dye aggregation; post-treatment; interfacial electron injection
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.7, no.9, pp.5150 - 5159
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 7
- Number
- 9
- Start Page
- 5150
- End Page
- 5159
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/94138
- DOI
- 10.1021/am507405b
- ISSN
- 1944-8244
- Abstract
- Dye aggregation and concomitant reduction of dye excited-state lifetimes and electron-injection yields constitute a significant mechanism for diminution of light-to-electrical energy conversion efficiencies in many dye-sensitized solar cells (DSCs). For TiO2-based DSCs prepared with an archetypal donor-acceptor organic dye, (E)-2-cyano-3-(5'-(5''-(p-(diphenylamino)phenyl)-thiophen-2''-yl)thiophen-2'-yl)acrylic acid (OrgD), we find, in part via ultrafast spectroscopy measurements, that postdye-adsorption atomic layer deposition (ALD) of ultrathin layers of either TiO2 or Al2O3 effectively reverses residual aggregation. Notably, the ALD treatment is significantly more effective than the widely used aggregation-inhibiting coadsorbent, chenodeoxycholic acid. Primarily because of reversal of OrgD aggregation, and resulting improved injection yields, ALD post-treatment engenders a 30+% increase in overall energy conversion efficiency. A secondary contributor to increased currents and efficiencies is an ALD-induced attenuation of the rate of interception of injected electrons, resulting in slightly more efficient charge collection.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.