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Author Takeda, Yasuhiko ♦ Sugimoto, Noriaki ♦ Ichiki, Akihisa ♦ Kusano, Yuya ♦ Motohiro, Tomoyoshi
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CARRIERS ♦ EFFECTIVE MASS ♦ HAMILTONIANS ♦ QUANTUM DOTS ♦ QUANTUM WELLS ♦ SEMICONDUCTOR MATERIALS ♦ SOLAR CELLS ♦ TUNNEL DIODES
Abstract Among the four features unique to hot-carrier solar cells (HC-SCs): (i) carrier thermalization time and (ii) carrier equilibration time in the absorber, (iii) energy-selection width and (iv) conductance of the energy-selective contacts (ESCs), requisites of (i)-(iii) for high conversion efficiency have been clarified. We have tackled the remaining issues related to (iv) in the present study. The detailed balance model of HC-SC operation has been improved to involve a finite value of the ESC conductance to find the required values, which in turn has been revealed to be feasible using resonant tunneling diodes (RTDs) consisting of semiconductor quantum dots (QDs) and quantum wells (QWs) by means of a formulation to calculate the conductance of the QD- and QW-RTDs derived using the rigorous solutions of the effective-mass Hamiltonians. Thus, all of the four requisites unique to HC-SCs to achieve high conversion efficiency have been elucidated, and the two requisites related to the ESCs can be fulfilled using the QD- and QW-RTDs.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-28
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 12


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