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Enhanced carrier collection efficiency and reduced quantum state absorption by electron doping in self-assembled quantum dot solar cells

Li, Tian; Lu, Haofeng; Fu, Lan; Tan, Hark Hoe; Jagadish, Chennupati; Dagenais, Mario


Reduced quantum dot (QD) absorption due to state filling effects and enhanced electron transport in doped QDs are demonstrated to play a key role in solar energy conversion. Reduced QD state absorption with increased n-doping is observed in the self-assembled In0.5Ga0.5As/GaAs QDs from high resolution below-bandgap external quantum efficiency (EQE) measurement, which is a direct consequence of the Pauli exclusion principle. We also show that besides partial filling of the quantum states,...[Show more]

CollectionsANU Research Publications
Date published: 2015-02-05
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.4907348


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