TY - JOUR
T1 - Comparison of bulk material candidates for hot carrier absorber
AU - Yao, Yao
AU - Koenig, Dirk
PY - 2015/9
Y1 - 2015/9
N2 - We investigated four hot carrier (HC) absorber material candidates InN, BSb, InP and AlSb for HC solar cells. Their potential of making good absorbers was estimated based on available experimental data from literature and theoretical results from high accuracy density functional theory calculations. For a comprehensive assessment of HC thermalization, we developed a new method to quantify HC cooling powers in these materials. Contrary to common belief, our results show that a minimum optical frequency higher than twice the maximum acoustical frequency is not vital for HC absorber materials. For materials with highly polar bonds, Ridley decay triggers significant thermalization, compromising the usefulness of certain HC absorber candidates such as InN. (C) 2015 Elsevier B.V. All rights reserved.
AB - We investigated four hot carrier (HC) absorber material candidates InN, BSb, InP and AlSb for HC solar cells. Their potential of making good absorbers was estimated based on available experimental data from literature and theoretical results from high accuracy density functional theory calculations. For a comprehensive assessment of HC thermalization, we developed a new method to quantify HC cooling powers in these materials. Contrary to common belief, our results show that a minimum optical frequency higher than twice the maximum acoustical frequency is not vital for HC absorber materials. For materials with highly polar bonds, Ridley decay triggers significant thermalization, compromising the usefulness of certain HC absorber candidates such as InN. (C) 2015 Elsevier B.V. All rights reserved.
KW - Dfpt
KW - Hot carrier solar cell
KW - Hot optical phonon relaxation
KW - Thermalization power
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=anu_research_portal_plus2&SrcAuth=WosAPI&KeyUT=WOS:000356746800055&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.1016/j.solmat.2015.05.002
DO - 10.1016/j.solmat.2015.05.002
M3 - Article
SN - 0927-0248
VL - 140
SP - 422
EP - 427
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
ER -