基链障碍物用于染料敏感太阳能电池中的动力优化
Jessica E Kroeze1, Narukuni Hirata, Sara Koops
1Centre for Electronic Materials and Devices, Imperial College London, London SW7 2AY, United Kingdom. j.e.kroeze@tue.nl
Journal of the American Chemical Society
|December 15, 2006
概括
在染料敏感的太阳能电池中优化染料链长度可以平衡电荷重组和再生. 较长的链延缓了重组,但也减少了电子注入和染料再生,影响了设备的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 太阳能光伏发电是如何实现的
- 电化学 电化学 电化学
背景情况:
- 染料敏感太阳能电池 (DSSC) 依赖于高效的接口电荷传输以获得最佳性能.
- 控制电子孔重组对于最大限度地提高DSSC中的功率转换效率至关重要.
- 带有不同基链长度的两类染料提供了一种调整界面动态的策略.
研究的目的:
- 调查染料基链长度对液体电解质和固态DSSC电荷分离和重组动态的影响.
- 为了将这些动态与光伏设备性能相关联.
- 阐明控制电子转移和再生过程的动力因素.
主要方法:
- 时间分辨率的发射光谱仪用于监测电子注入动态.
- 暂时光学吸收光谱学用于研究电荷重组和染料再生.
- 具有不同染料结构的DSSC的制造和性能测试.
主要成果:
- 增加染料基链长度显著减缓了与染料离子和孔导体 (螺旋OMeTAD或电解质) 的电荷重组率.
- 然而,较长的基链也降低了电子注入TiO2电极和染料再生的速度.
- 电子重组和染料再生之间的动力平衡对于液体电解质DSSC至关重要,当再生有效与重组竞争时,可以达到最佳性能.
结论:
- 染料基链长度在DSSC中具有关键的设计参数,影响了减少重组和电荷转移速率之间的权衡.
- 通过仔细调整染料结构和电解质/孔导体相互作用,最大限度地减少动力冗余对于高效的固态和液态电解质DSSC至关重要.
- 了解这些界面动态为设计下一代光伏设备提供了途径.
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