標題: Organic solar cells featuring nanobowl structures
作者: Wei, Hung-Yu
Huang, Jen-Hsien
Hsu, Chih-Yu
Chang, Feng-Chih
Ho, Kuo-Chuan
Chu, Chih-Wei
應用化學系
光電工程學系
Department of Applied Chemistry
Department of Photonics
公開日期: 1-四月-2013
摘要: Although organic solar cells having a bilayer configuration provide continuous conducting pathways for carrier transport to the requisite electrodes, their efficiencies have remained low because of the short exciton diffusion lengths of organic semiconductors. In this paper, we describe unique spatial organic solar cells featuring nanobowl array structures that capture more light and generate more power than planar organic solar cells. To construct bilayer solar cells, we used electrochemical deposition (with polystyrene beads as the template) to fabricate poly(3,4-ethylenedioxythiophene) nanobowl arrays, functioning as the hole extraction layer, on indium tin oxide substrates and then deposited copper phthalocyanine and a fullerene (C-60 or C-70) to function as the active layer, onto the nanobowl arrays. By implementing this spatial structure, we could control the active layer's thickness, such that it would be suitable for exciton dissociation, while maintaining a high absorption of incident light (by increasing the absorber volume without decreasing the area of the donor-acceptor interface, such that the light path in the active layer was increased) and ensuring high exciton dissociation efficiency (by enlarging the donor-acceptor interface). Relative to an equally thick planar control active layer the photocurrent generated by such bilayer solar cells increased by approximately 90%.
URI: http://dx.doi.org/10.1039/c3ee24128a
http://hdl.handle.net/11536/21358
ISSN: 1754-5692
DOI: 10.1039/c3ee24128a
期刊: ENERGY & ENVIRONMENTAL SCIENCE
Volume: 6
Issue: 4
起始頁: 1192
結束頁: 1198
顯示於類別:期刊論文


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