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石墨烯:一种无金属材料作为孔转移层,用于制造生产的量子点感应光阴管

Jian Li¹, Xin Gao², Bin Liu¹

¹Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences , Beijing 100190, P.R. China.

Journal of the American Chemical Society

|March 11, 2016

概括

石墨烯 (GDY) 通过作为孔转移层来增强光电化学水分. 这种新型的碳材料提高了太阳能设备的光电流和生产效率.

科学领域:

材料科学
电化学
纳米技术

背景情况:

光电化学 (PEC) 水分是可再生能源的关键技术.
有效的孔转移层对于优化PEC设备性能至关重要.
新的碳材料为能源应用提供独特的电子特性.

研究的目的:

将石墨烯 (GDY) 作为PEC水分裂细胞中的新型孔转移层.
研究GDY和半导体量子点之间的界面相互作用.
评估使用GDY的PEC设备的性能提升.

主要方法:

采用GDY的PEC光电极的制造.
使用拉曼光谱和紫外线光电子光谱 (UPS) 的表征.
在中性水溶液中模拟太阳辐射 (Xe灯) 的性能测试.

主要成果:

在 GDY 和 CdSe 量子点之间观察到强大的 π-π 相互作用,从而促进洞运输.
在0V与NHE时达到70μAcm2的光电密度.
已证明的演变率为90±5%,在12小时内具有良好的稳定性.

结论:

石墨烯 (GDY) 有效地作为PEC水分的孔转移材料.
GDY和量子点之间的π-π相互作用显著增强光电流.
GDY是开发高效的太阳能驱动水分装置的有希望的材料.

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