| Autor: |
Lan Fu, Weida Hu, Xiaohao Zhou, Tianxin Li, Jiaxiang Guo, Man Luo, Jiafu Ye, Liaoxin Sun, Runzhang Xie, Tengfei Xu, Hui Xia, Xun Ge, Muhammad Zubair, Fang Wang, Hailu Wang, Yicheng Zhu, Weiwei Liu, Chenhui Yu, Wei Lu, Deyan Sun, Qiandong Zhuang |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Nano letters. 21(18) |
| ISSN: |
1530-6992 |
| Popis: |
Hot carrier harvest could save 30% energy loss in solar cells. So far, however, it is still unreachable as the photoexcited hot carriers are short-lived, ∼1 ps, determined by a rapid relaxation process, thus invalidating any reprocessing efforts. Here, we propose and demonstrate a feasible route to reserve hot electrons for efficient collection. It is accomplished by an intentional mix of cubic zinc-blend and hexagonal wurtzite phases in III-V semiconductor nanowires. Additional energy levels are then generated above the conduction band minimum, capturing and storing hot electrons before they cool down to the band edges. We also show the superiority of core/shell nanowire (radial heterostructure) in extracting hot electrons. The strategy disclosed here may offer a unique opportunity to modulate hot carriers for efficient solar energy harvest. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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