Integration of Semiconducting Sulfides for Full-Spectrum Solar Energy Absorption and Efficient Charge Separation

作者：Zhuang, Tao-Tao; Liu, Yan; Li, Yi; Zhao, Yuan; Wu, Liang; Jiang, Jun^*; Yu, Shu-Hong^*

来源：Angewandte Chemie International Edition, 2016, 55(22): 6396-6400.

DOI：10.1002/anie.201601865

• charge separation
• heteronanorods
• photocatalysis
• solar energy conversion
• ternary systems

The full harvest of solar energy by semiconductors requires a material that simultaneously absorbs across the whole solar spectrum and collects photogenerated electrons and holes separately. The stepwise integration of three semi-conducting sulfides, namely ZnS, CdS, and Cu2-xS, into a single nanocrystal, led to a unique ternary multi-node sheath ZnS-CdS-Cu2-xS heteronanorod for full-spectrum solar energy absorption. Localized surface plasmon resonance (LSPR) in the nonstoichiometric copper sulfide nanostructures enables effective NIR absorption. More significantly, the construction of pn heterojunctions between Cu2-xS and CdS leads to staggered gaps, as confirmed by first-principles simulations. This band alignment causes effective electron-hole separation in the ternary system and hence enables efficient solar energy conversion.

• 出版日期2016-5-23
• 单位中国科学技术大学; 中国科学院