Spectrally Resolved Interband and Intraband Transitions by Two-Step Photon Absorption in InGaAs/GaAs Quantum Dot Solar Cells
Source abstract
Abstract
Two-step photon absorption processes in a self-organized In 0.4 Ga 0.6 As/GaAs quantum dot solar cell have been investigated by means of infrared (IR) light-biased change in external quantum efficiency (ΔEQE) spectroscopy at 9 K. In this paper, not only interband transitions but intraband transitions were both spectrally resolved by utilizing wavelength tunable intense mid-IR pulsed laser as the IR bias light source. The obtained EQE enhancement was attributed from reexcitation of photocarriers captured by quantum dots. The bound-to-continuum intraband transition probability was estimated to be about 8% by irradiating 100-suns-equivalent IR bias light.
Source: openalex_inverted_index · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Semiconductor Quantum Structures and Devices · Semiconductor Lasers and Optical Devices · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
Funding
New Generation Concentration Photovoltaics program · Incorporated Administrative Agency New Energy and Industrial Technology Development Organization · Ministry of Economy, Trade, and Industry
References (26)
Show source-provided references
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