Open AccessType II GaSb quantum ring solar cells under concentrated sunlight
Author(s) -
Che-Pin Tsai,
Shun-Chieh Hsu,
ShihYen Lin,
ChingWen Chang,
Li-Wei Tu,
Kun-Cheng Chen,
Tsong-Sheng Lay,
ChienChung Lin
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.00a359
Subject(s) - quantum efficiency , sunlight , optoelectronics , solar cell , photoluminescence , open circuit voltage , optics , materials science , ring (chemistry) , wavelength , short circuit , quantum , absorption (acoustics) , physics , voltage , chemistry , quantum mechanics , organic chemistry
A type II GaSb quantum ring solar cell is fabricated and measured under the concentrated sunlight. The external quantum efficiency confirms the extended absorption from the quantum rings at long wavelength coinciding with the photoluminescence results. The short-circuit current of the quantum ring devices is 5.1% to 9.9% more than the GaAs reference's under various concentrations. While the quantum ring solar cell does not exceed its GaAs counterpart in efficiency under one-sun, the recovery of the open-circuit voltages at higher concentration helps to reverse the situation. A slightly higher efficiency (10.31% vs. 10.29%) is reported for the quantum ring device against the GaAs one.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom