Bandtail Limits to Solar Conversion Efficiencies in Amorphous Silicon Solar Cells | Zendy

Kai Zhu | Zendy; J. Yang | Zendy; Wendong Wang | Zendy; E. A. Schiff | Zendy; Jianjun Liang | Zendy; Supratik Guha | Zendy

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Bandtail Limits to Solar Conversion Efficiencies in Amorphous Silicon Solar Cells

Author(s) -

Kai Zhu,

J. Yang,

Wendong Wang,

E. A. Schiff,

Jianjun Liang,

Supratik Guha

Publication year - 2003

Publication title -

mrs proceedings

Language(s) - English

Resource type - Journals

eISSN - 1946-4274

pISSN - 0272-9172

DOI - 10.1557/proc-762-a3.2

Subject(s) - materials science , amorphous silicon , solar cell , open circuit voltage , range (aeronautics) , energy conversion efficiency , optoelectronics , silicon , computational physics , engineering physics , voltage , crystalline silicon , electrical engineering , physics , composite material , engineering

We describe a model for a-Si:H based pin solar cells derived primarily from valence bandtail properties. We show how hole drift-mobility measurements and measurements of the temperature-dependence of the open-circuit voltage VOC can be used to estimate the parameters, and we present VOC(T) measurements. We compared the power density under solar illumination calculated with this model with published results for as-deposited a-Si:H solar cells. The agreement is within 4% for a range of thicknesses, suggesting that the power from as-deposited cells is close to the bandtail limit.

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