Cited 1 time in webofscience Cited 0 time in scopus

Effect of Structural Non-Planarity and pi-Conjugated Unit of Novel Bicarbazole Derivatives for Dye-Sensitized Solar Cells

Title
Effect of Structural Non-Planarity and pi-Conjugated Unit of Novel Bicarbazole Derivatives for Dye-Sensitized Solar Cells
Authors
Jo, Hyo JeongNam, Jung EmKim, Hyo JeongKim, Dae HwanHwang, Dae KueKang, Jin Kyu
DGIST Authors
Hwang, Dae KueKang, Jin Kyu
Issue Date
2016-07
Citation
Science Of Advanced Materials, 8(7), 1381-1389
Type
Article
Article Type
Article
Keywords
EFFICIENT MOLECULAR PHOTOVOLTAICSORGANIC-DYESCHARGE-TRANSFERCARBAZOLEDESIGNDONORPERFORMANCEACCEPTOR
ISSN
1947-2935
Abstract
Novel bicarbazole-based organic dyes (hereafter denoted as BEC, BECS1, and BECS2) having nonplanar structures were designed and synthesized; for comparison, the corresponding dye (EC) with a planar structure was also synthesized. The effects of length of the π-conjugated unit on the photophysical, electrochemical, and photovoltaic properties of the dyes were investigated. The results showed that the nonplanar molecular structure helps in preventing charge recombination. In addition, more extended π-conjugated systems should lead to long-wavelength absorption, broadening of the absorption profile, and enhancement of the molar extinction coefficient with respect to those of D-π-A sensitizers. These factors collectively contribute to improved light harvesting. The maximum power conversion efficiency reached 6.4% in the case of BECS2 under an opencircuit voltage of 0.653 V and short-circuit photocurrent density of 15.45 mA cm-2, which could be due to the relatively high absorption ability of this dye. © 2016 by American Scientific Publishers.
URI
http://hdl.handle.net/20.500.11750/5671
DOI
10.1166/sam.2016.2729
Publisher
AMER SCIENTIFIC PUBLISHERS
Related Researcher
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Solar Energy1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE