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A theoretical model is proposed to study the effects of carrier escape and capture processes on the photocurrent of quantum well solar cells (QWSCs). The results show that solar cells with very deep quantum wells (QWs) will suffer from extremely slow escape processes and their photocurrent can be inferior to their bulk counterparts. The results suggest that only when the escape time is at least two-order of magnitude smaller than the carrier lifetime of QWs, solar cells will benefit from QW structures. The optimal band gap energies of QW materials for achieving the maximum photocurrent are also calculated and discussed.
References
-
-
1)
-
T.C. Yi ,
L.F. Eastman ,
Y.H. Lo ,
T.C. Yao
.
Breakdown of thermionic emission theory for quantum wells.
Appl. Phys. Lett.
,
4 ,
469 -
471
-
2)
-
J. Nelson ,
M. Paxman ,
K.W.J. Barnham ,
J.S. Roberts ,
C. Button
.
Steady state carrier escape from single quantum wells.
IEEE J. Quantum Electron.
,
6 ,
1460 -
1468
-
3)
-
S.M. Ramey ,
R. Khoie
.
Modeling of multiple-quantum-well solar cells including capture, escape, and recombination of photoexcited carrier in quantum wells.
IEEE Trans. Electron Devices
,
5 ,
1179 -
1188
-
4)
-
M. Mazzer ,
K.W.J. Barnham ,
I.M. Ballard
.
Progress in quantum well solar cells.
Thin Solid Films
,
76 -
83
-
5)
-
S.C. McFarlane ,
J. Barnes ,
K.W.J. Barnham ,
E.S.M. Tsui ,
C. Button ,
J.S. Roberts
.
Space charge effects in carrier escape from single quantum well structures.
J. Appl. Phys.
,
9 ,
5109 -
5115
-
6)
-
A. Zachariou ,
J. Barnes ,
K.W. Barnham
.
A carrier escape study from InP/InGaAs single quantum well solar cells.
J. Appl. Phys.
,
2 ,
877 -
881
-
7)
-
C.-Yi Tsai ,
C.-Yao Tsai ,
Y.H. Lo ,
R.M. Spencer ,
L.F. Eastman
.
Nonlinear gain coefficient in semiconductor quantum-well lasers: effects of carrier diffusion, capture, and escape.
IEEE J. Sel. Top. Quantum Electron.
,
2 ,
316 -
329
-
8)
-
Q. Wei ,
K.T. Shiu ,
N.C. Giebink ,
S.R. Forrest
.
Thermodynamic limits of quantum photovoltaic cell efficiency.
Appl. Phys. Lett.
,
22
-
9)
-
Connolly, J.P., Ballard, I.M., Barnham, K.W.J., Bushnell, D.B., Tibbits, T.N.D., Roberts, J.S.: `Efficiency limits of quantum well solar cells', Proc. 19th European Photovoltaic Solar Energy Conf., 2004, p. 355–358.
-
10)
-
A. Alemu ,
J.A.H. Coaquira ,
A. Freundlich
.
Dependence of device performance on carrier escape sequence in multi-quantum-well p-i-n solar cells.
J. Appl. Phys.
,
8
-
11)
-
J. Nelson ,
J. Barnes ,
N. Ekins-Daukes
.
Observation of suppressed radiative recombination in single quantum well p-i-n photodiodes.
J. Appl. Phys.
,
12 ,
6240 -
6246
-
12)
-
D.M.-T. Kuo ,
Y.C. Chang
.
Dynamic behavior of electron tunneling and dark current in quantum-well systems under an electric field.
Phys. Rev. B
,
23 ,
15957 -
15964
-
13)
-
J. Barnes ,
E.S.M. Tsui ,
K.W.J. Barnham ,
S.C. McFarlane ,
C. Button ,
J.S. Roberts
.
Steady state photocurrent and photoluminescence from single quantum wells as a function of temperature and bias.
J. Appl. Phys.
,
2 ,
892 -
900
-
14)
-
N.G. Anderson
.
Ideal theory of quantum well solar cells.
J. Appl. Phys.
,
3 ,
1850 -
1861
-
15)
-
T.C. Yi ,
C.H. Chen ,
T.L. Sung ,
T.C. Yao ,
J.M. Rorison
.
Theoretical modeling of the small-signal modulation response of carrier and lattice temperatures with the dynamics of nonequilibrium optical phonons in semiconductor lasers.
IEEE J. Sel. Top. Quantum Electron.
,
3 ,
596 -
605
-
16)
-
Connolly, J.P., Führer, M.F., Johnson, D.C.: `Mirrored strain-balanced quantum well concentrator cells in the radiative limit', Proc. 4th Int. Conf. Solar Concentrators for the Generation of Electricity or Hydrogen, 2007, p. 21–24.
-
17)
-
S.M. Sze
.
(1981)
Physics of semiconductor devices.
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