Progress in three-terminal heterojunction bipolar transistor solar cells
- Univ. Politecnica de Madrid (Spain). Instituto de Energía Solar
- National Renewable Energy Laboratory (NREL) Golden CO USA
Conventional solar cells, including multijunction solar cells, are based on pn junctions as building blocks. In contrast, the three-terminal heterojunction bipolar transistor solar cell (3T-HBTSC) explores the use of a bipolar transistor structure to build a solar cell. The limiting efficiency of this transistor structure equals that of a double-junction solar cell. However, since the 3T-HBTSC does not require tunnel junctions, its minimal structure has only three semiconductor layers, while the minimal structure of a double junction solar cell has six. This work reviews the operation principles of this solar cell and the steps carried out towards its practical implementation. Experimental results on a GaInP/GaAs HBTSC prototype with bottom interdigitated contacts are presented.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1845667
- Alternate ID(s):
- OSTI ID: 1874986
- Report Number(s):
- NREL/JA-5K00-80433; MainId:42636; UUID:ee2aca43-f935-43a8-aeb8-6ed5160d1f69; MainAdminID:25728
- Journal Information:
- Progress in Photovoltaics, Journal Name: Progress in Photovoltaics Journal Issue: 8 Vol. 30; ISSN 1062-7995
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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