Nanoporous platinum counter electrodes by glancing angle deposition for dye-sensitized solar cells

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• 作者：Sui-Ying Hsu^a ; Chih-Hung Tsai^a ; ^{chihhtsai@ntu.edu.tw} ; Chun-Yang Lu^a ; Yu-Tang Tsai^a ; Tsung-Wei Huang^a ; Yuan-Hsuan Jhang^a ; Yan-Fang Chen^a ; Chung-Chih Wu^a ; ^{chungwu@cc.ee.ntu.edu.tw} ; Yen-Shan Chen^b
• 关键词：DSSCs ; Counter electrode ; Porous ; Nanostructure ; Platinum ; GLAD
• 刊名：Organic Electronics
• 出版年：2012
• 期刊代码：137_15661199
• 类别：et
• 出版时间：May, 2012
• 卷：13
• 期：5
• 页码：856-863
• 文件大小：1057 K

摘要

We report an effective way to produce nanoporous Pt counter electrodes of dye-sensitized solar cells by the glancing-angle deposition (GLAD) technique. By controlling the orientation of the substrate relative to the incident Pt vapor flux during the deposition, nanoporous films composed of inclined nm-scale columns were produced through the self-shadowing effect. Pt counter electrodes having varied nanoporous structures were characterized for their morphological and electrochemical properties, and were subjected to device studies to establish the correlation with DSSC characteristics/performances. The results suggest that the nanoporous GLAD Pt electrodes can effectively enhance active surface areas, the catalytic ability and charge exchange at the Pt/electrolyte interface of a DSSC. As a result, the quantum efficiency, short-circuit current, and power conversion efficiency of the DSSC can be enhanced by up to 12-13%with using the nanoporous GLAD Pt counter electrodes.