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Quantum-well passivating contact at polysilicon/crystalline silicon interface for crystalline silicon solar cells.
- Source :
-
Chemical Engineering Journal . Dec2022, Vol. 449, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • Innovative passivating contact using quantum well at poly-Si/c-Si interface. • Efficacy of quantum well on large-area TOPCon device is discussed. • The quantum well improves the V oc by 20 mV. • The quantum-well device achieves an efficiency of 23.91%. Polysilicon/crystalline silicon (poly-Si/c-Si) passivating contact is attracting attention as a promising passivation technology for c-Si solar cells. Recently, we have proposed a quantum-well passivating contact (QWPC) that uses a quantum-well at the poly-Si/c-Si interface to suppress recombination, such as Auger and/or Shockley-Read-Hall recombination, due to deep dopant-diffusion problems from poly-Si into the c-Si absorber and, as a result, promote the passivation quality. Herein, we demonstrate the effectiveness of the QWPC in a large area (272.13 cm2) of c-Si photovoltaic devices. A reference device, featuring a front boron diffusion emitter and normal rear poly-Si/c-Si passivating contact without QWPC, achieves a certified 22.99% conversion efficiency. The QWPC significantly reduces recombination losses within the device, as demonstrated by bias external quantum efficiency and dark I-V characteristics. The QWPC improves the open-circuit voltage (V oc) by 20 mV. An antireflection magnesium fluoride coating applied at the front along with the QWPC improves the short-circuit current density by 1.27 mA/cm2. The QWPC device achieves a conversion efficiency of 23.91%. The QWPC demonstrates an innovative passivating contact for promoting c-Si solar cell performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 449
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 158933602
- Full Text :
- https://doi.org/10.1016/j.cej.2022.137835