標題: | The influence of electron injection and charge recombination kinetics on the performance of porphyrin-sensitized solar cells: effects of the 4-tert-butylpyridine additive |
作者: | Chang, Yu-Cheng Wu, Hui-Ping Reddy, Nagannagari Masi Lee, Hsuan-Wei Lu, Hsueh-Pei Yeh, Chen-Yu Diau, Eric Wei-Guang 應用化學系 應用化學系分子科學碩博班 Department of Applied Chemistry Institute of Molecular science |
公開日期: | 2013 |
摘要: | The effects of the 4-tert-butylpyridine (TBP) additive in the electrolyte on photovoltaic performance of two push-pull porphyrin sensitizers (YD12 and YD12CN) were examined. Addition of TBP significantly increased the open-circuit voltage (V-OC) for YD12 (from 550 to 729 mV) but it was to a lesser extent for YD12CN (from 544 to 636 mV); adding TBP also had the effect of reducing the short-circuit current density (J(SC)) slightly for YD12 (from 17.65 to 17.19 mA cm(-2)) but it led to a significant reduction for YD12CN (from 16.45 to 9.78 mA cm(-2)). The resulting power conversion efficiencies of the YD12 devices increase from 6.2% to 8.5% whereas those of the YD12CN devices decrease from 5.8% to 4.5%. Based on measurements of temporally resolved photoelectric transients of the devices and femtosecond fluorescence decays of thin-film samples, the poor performance of the YD12CN device in the presence of TBP can be understood as being due to the enhanced charge recombination, decreased electron injection, and a lesser extent of inhibition of the intermolecular energy transfer. |
URI: | http://hdl.handle.net/11536/21480 http://dx.doi.org/10.1039/c3cp44555k |
ISSN: | 1463-9076 |
DOI: | 10.1039/c3cp44555k |
期刊: | PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
Volume: | 15 |
Issue: | 13 |
起始頁: | 4651 |
結束頁: | 4655 |
顯示於類別: | 期刊論文 |