TY - GEN
T1 - Valley Photovoltaics and the Search for the Hot Carrier Solar Cell
AU - Ferry, David K.
AU - Goodnick, Stephen M.
AU - Sellers, Ian R.
AU - Whiteside, Vincent R.
N1 - Funding Information:
Work at Oklahoma is supported by NSF through grant ECCS-1610062
Publisher Copyright:
© 2020 IEEE.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020/6/14
Y1 - 2020/6/14
N2 - In order to achieve a hot carrier solar cell, one must: (a) prevent significant energy loss to phonons; and (b) extract primarily the hot carriers. We have recently suggested a new approach to these problems by using metastable upper energy levels to store the photogenerated carriers. A proof of concept cell based upon an InGaAs/InAlAs structure has yielded encouraging results that suggest that valley storage is occurring and yielding a V_{OC} > E_{G}. Current output, however, is restricted apparently due to a barrier between the L valleys in the two materials. New materials may provide the solution to this problem and lead to a new HCSC with greatly enhanced efficiency.
AB - In order to achieve a hot carrier solar cell, one must: (a) prevent significant energy loss to phonons; and (b) extract primarily the hot carriers. We have recently suggested a new approach to these problems by using metastable upper energy levels to store the photogenerated carriers. A proof of concept cell based upon an InGaAs/InAlAs structure has yielded encouraging results that suggest that valley storage is occurring and yielding a V_{OC} > E_{G}. Current output, however, is restricted apparently due to a barrier between the L valleys in the two materials. New materials may provide the solution to this problem and lead to a new HCSC with greatly enhanced efficiency.
KW - hot carriers
KW - solar cells
KW - valley photovoltaics
UR - http://www.scopus.com/inward/record.url?scp=85099597174&partnerID=8YFLogxK
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U2 - 10.1109/PVSC45281.2020.9300499
DO - 10.1109/PVSC45281.2020.9300499
M3 - Conference contribution
AN - SCOPUS:85099597174
T3 - Conference Record of the IEEE Photovoltaic Specialists Conference
SP - 498
EP - 501
BT - 2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
Y2 - 15 June 2020 through 21 August 2020
ER -