Hydrogenated Amorphous Silicon Emitter and Back-Surface-Field Contacts for Crystalline Silicon Solar Cells
Thin hydrogenated amorphous silicon (a-Si:H) layers deposited by hot-wire chemical vapor deposition (HWCVD) are investigated as emitters and back-surface-field (BSF) contacts to make silicon heterojunction solar cells on p-type crystalline silicon wafers. A common requirement for excellent emitter and BSF quality is minimization of interface recombination. Best results require immediate a Si:H deposition and an abrupt and flat interface to the c-Si substrate. We obtain record 16.9% and 14.8% efficiencies on p-type planar float-zone (FZ) and Czochralski (CZ) silicon substrates, respectively, with HWCVD a-Si:H(n) emitters and Al-BSF contacts. Initial efforts with p-type HWCVD Si thin films as the BSF have yielded 12.5% efficiency on p type CZ-Si.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC36-99GO10337
- OSTI ID:
- 860682
- Report Number(s):
- NREL/CP-520-37033
- Country of Publication:
- United States
- Language:
- English
Similar Records
17.5% p-Type Silicon Heterojunction Solar Cells with HWCVD a-Si:H as the Emitter and Back Contact
Progress in Silicon Heterojunction Devices by Hot-Wire CVD: Preprint
Related Subjects
14 SOLAR ENERGY
36 MATERIALS SCIENCE
AMORPHOUS SILICON (A-SI:H)
BACK-SURFACE-FIELD (BSF)
CHEMICAL VAPOR DEPOSITION
CRYSTALLINE SILICON WAFERS
DEPOSITION
EFFICIENCY
HETEROJUNCTION SOLAR CELLS
HETEROJUNCTIONS
HOT-WIRE CHEMICAL VAPOR DEPOSITION (HWCVD)
HYDROGENATE
MINIMIZATION
P-TYPE
PV
RECOMBINATION
SILICON
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR ENERGY
SUBSTRATES
Silicon Materials and Devices
Solar Energy - Photovoltaics
THIN FILMS