Nanobelt–carbon nanotube cross-junction solar cells
2012; Royal Society of Chemistry; Volume: 5; Issue: 3 Linguagem: Inglês
10.1039/c2ee03409c
ISSN1754-5706
AutoresEnzheng Shi, Jingqi Nie, Xiaojun Qin, Zhongjun Li, Luhui Zhang, Zhen Li, Peixu Li, Yi Jia, Chunyan Ji, Jinquan Wei, Kunlin Wang, Hongwei Zhu, Dehai Wu, Yan Li, Ying Fang, Weizhong Qian, Fei Wei, Anyuan Cao,
Tópico(s)Semiconductor materials and interfaces
ResumoNanostructures such as carbon nanotubes (CNTs) and semiconducting nanowires are promising candidates for developing next-generation photovoltaics. Here, we report solar cells using individual single-walled or double-walled CNTs and CdSe nanobelts arranged in simple cross-junction configurations. The CNT and CdSe nanobelts form reliable line contacts at their intersections, resulting in efficient heterojunction solar cells with power conversion efficiencies up to 1.87% and stable performance in air over long periods. Both semiconducting and metallic CNTs can form solar cells with CdSe nanobelts, with similar open-circuit voltages but different short-circuit current densities. We can integrate multiple CNTs in parallel with a single nanobelt to construct an array of cross-junction solar cells simultaneously, with scaled current output, indicating the possibility of parallel device connection and large-scale production. Our results show the potential of utilizing one-dimensional nanostructures to design and fabricate high performance photovoltaic devices with well-defined and scalable structures.
Referência(s)