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Can quantum coherent solar cells break detailed balance?
Kirk, Alexander P.
Journal of applied physics, 2015-07, Vol.118 (3)
[Periódico revisado por pares]
Melville: American Institute of Physics
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Título:
Can quantum coherent solar cells break detailed balance?
Autor:
Kirk, Alexander P.
Assuntos:
ABSORPTION
;
Applied physics
;
Carrier recombination
;
Carriers
;
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
;
Coherence
;
COMPLIANCE
;
CONVERSION
;
CURRENT DENSITY
;
DESIGN
;
Design engineering
;
EFFICIENCY
;
ELECTRIC POTENTIAL
;
Energy conversion efficiency
;
ENGINEERS
;
ENTROPY
;
LAWS
;
OPERATION
;
Photon absorption
;
PHOTON EMISSION
;
PHOTONS
;
Photovoltaic cells
;
QUANTUM STATES
;
Radiative recombination
;
RECOMBINATION
;
RELAXATION
;
SOLAR CELLS
;
STATISTICAL MECHANICS
;
STEADY-STATE CONDITIONS
;
THERMODYNAMICS
;
THRESHOLD ENERGY
É parte de:
Journal of applied physics, 2015-07, Vol.118 (3)
Descrição:
Carefully engineered coherent quantum states have been proposed as a design attribute that is hypothesized to enable solar photovoltaic cells to break the detailed balance (or radiative) limit of power conversion efficiency by possibly causing radiative recombination to be suppressed. However, in full compliance with the principles of statistical mechanics and the laws of thermodynamics, specially prepared coherent quantum states do not allow a solar photovoltaic cell—a quantum threshold energy conversion device—to exceed the detailed balance limit of power conversion efficiency. At the condition given by steady-state open circuit operation with zero nonradiative recombination, the photon absorption rate (or carrier photogeneration rate) must balance the photon emission rate (or carrier radiative recombination rate) thus ensuring that detailed balance prevails. Quantum state transitions, entropy-generating hot carrier relaxation, and photon absorption and emission rate balancing are employed holistically and self-consistently along with calculations of current density, voltage, and power conversion efficiency to explain why detailed balance may not be violated in solar photovoltaic cells.
Editor:
Melville: American Institute of Physics
Idioma:
Inglês
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