scholarly journals Electromodulation spectroscopy of highly mismatched alloys

2019 ◽  
Vol 126 (14) ◽  
pp. 141102 ◽  
Author(s):  
Robert Kudrawiec ◽  
Wladek Walukiewicz
Keyword(s):  
Highly Mismatched Alloys

scholarly journals Synthesis and optical properties of II-O-VI highly mismatched alloys

2004 ◽  
Vol 95 (11) ◽  
pp. 6232-6238 ◽  
Author(s):  
K. M. Yu ◽  
W. Walukiewicz ◽  
W. Shan ◽  
J. Wu ◽  
J. W. Beeman ◽  
...  
Keyword(s):  
Optical Properties ◽  
Highly Mismatched Alloys

Cl-doping effect in ZnTe1-xOx highly mismatched alloys for intermediate band solar cells

2019 ◽  
Vol 125 (24) ◽  
pp. 243109 ◽  
Author(s):  
Tooru Tanaka ◽  
Kento Matsuo ◽  
Katsuhiko Saito ◽  
Qixin Guo ◽  
Takeshi Tayagaki ◽  
...  
Keyword(s):  
Solar Cells ◽  
Doping Effect ◽  
Intermediate Band ◽  
Intermediate Band Solar Cells ◽  
Highly Mismatched Alloys

Synthesis of highly mismatched alloys using ion implantation and pulsed laser melting

2007 ◽  
Vol 261 (1-2) ◽  
pp. 1150-1154 ◽  
Author(s):  
K.M. Yu ◽  
M.A. Scarpulla ◽  
R. Farshchi ◽  
O.D. Dubon ◽  
W. Walukiewicz
Keyword(s):  
Ion Implantation ◽  
Pulsed Laser ◽  
Laser Melting ◽  
Highly Mismatched Alloys

scholarly journals Highly Mismatched Alloys for Intermediate Band Solar Cells

2005 ◽  
Vol 865 ◽  
Author(s):  
W. Walukiewicz ◽  
K. M. Yu ◽  
J Wu ◽  
J. W. Ager ◽  
W. Shan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Ion Beam ◽  
Detailed Balance ◽  
Solar Cell Performance ◽  
Intermediate Band ◽  
Intermediate Band Solar Cell ◽  
Balance Analysis ◽  
Highly Mismatched Alloys ◽  
Limiting Efficiency

AbstractIt has long been recognized that the introduction of a narrow band of states in a semiconductor band gap could be used to achieve improved power conversion efficiency in semiconductor-based solar cells. The intermediate band would serve as a “stepping stone” for photons of different energy to excite electrons from the valence to the conduction band. An important advantage of this design is that it requires formation of only a single p-n junction, which is a crucial simplification in comparison to multijunction solar cells. A detailed balance analysis predicts a limiting efficiency of more than 50% for an optimized, single intermediate band solar cell. This is higher than the efficiency of an optimized two junction solar cell. Using ion beam implantation and pulsed laser melting we have synthesized Zn1-yMnyOxTe1-x alloys with x<0.03. These highly mismatched alloys have a unique electronic structure with a narrow oxygen-derived intermediate band. The width and the location of the band is described by the Band Anticrossing model and can be varied by controlling the oxygen content. This provides a unique opportunity to optimize the absorption of solar photons for best solar cell performance. We have carried out systematic studies of the effects of the intermediate band on the optical and electrical properties of Zn1-yMnyOxTe1-x alloys. We observe an extension of the photovoltaic response towards lower photon energies, which is a clear indication of optical transitions from the valence to the intermediate band.

scholarly journals Carrier dynamics in dilute II-VI oxide highly mismatched alloys

2014 ◽  
Author(s):  
Yan-Cheng Lin ◽  
Wu-Ching Chou ◽  
Jen-Inn Chyi ◽  
Tooru Tanaka
Keyword(s):  
Carrier Dynamics ◽  
Highly Mismatched Alloys

Synthesis and optical properties of ZnTe1−xOx highly mismatched alloys for intermediate band solar cells

2012 ◽  
Author(s):  
T. Tanaka ◽  
T. Mochinaga ◽  
K. Saito ◽  
Q. Guo ◽  
M. Nishio ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Intermediate Band ◽  
Intermediate Band Solar Cells ◽  
Highly Mismatched Alloys

GaN1−xSbx highly mismatched alloys grown by low temperature molecular beam epitaxy under Ga-rich conditions

2013 ◽  
Vol 383 ◽  
pp. 95-99 ◽  
Author(s):  
W.L. Sarney ◽  
S.P. Svensson ◽  
S.V. Novikov ◽  
K.M. Yu ◽  
W. Walukiewicz ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Low Temperature ◽  
Molecular Beam ◽  
Highly Mismatched Alloys

Exploring thermoelectric materials for renewable energy applications: The case of highly mismatched alloys based on AlBi1-xSbx and InBi1-xSbx

2018 ◽  
Vol 93 ◽  
pp. 235-243 ◽  
Author(s):  
Bakhtiar Ul Haq ◽  
R. Ahmed ◽  
S. AlFaify ◽  
Faheem K. Butt ◽  
A. Shaari ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Thermoelectric Materials ◽  
Energy Applications ◽  
Highly Mismatched Alloys

scholarly journals Reactively Sputtered Sb-GaN Films and its Hetero-Junction Diode: The Exploration of the n-to-p Transition

Coatings ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 210
Author(s):  
Cao Phuong Thao ◽  
Thi Tran Anh Tuan ◽  
Dong-Hau Kuo ◽  
Wen-Cheng Ke ◽  
Thach Thi Via Sa Na
Keyword(s):  
Radio Frequency ◽  
Hole Concentration ◽  
Reactive Sputtering ◽  
Bandgap Energy ◽  
Electrical Characteristics ◽  
Cation Site ◽  
N2 Atmosphere ◽  
Anion Site ◽  
Highly Mismatched Alloys ◽  
P Type

Sb anion-substituted gallium nitride films were fabricated by radio frequency reactive sputtering with single Sb-containing cermet targets with different Sb contents under Ar/N2 atmosphere. n-type GaN films with electron concentration of (1.40 ± 0.1) × 1017 cm−3 inverted to p-type Sb-GaN with hole concentration of (5.50 ± 0.3) × 1017 cm−3. The bandgap energy of Sb anion-added Sb-GaN films decreased from 3.20 to 2.72 eV with increasing Sb concentration. The formation of p-type Sb-GaN is attributed to the formation of Ga vacancy at higher Sb concentration. The coexistence of Sb at the Ga cation site and N anion site is an interesting and important result, as GaNSb had been well developed for highly mismatched alloys. The hetero-junction with p-type Sb-GaN/n-Si diodes was all formed by radio frequency (RF) reactive sputtering technology. The electrical characteristics of Sb-GaN diode devices were investigated from −20 to 20 V at room temperature (RT).

scholarly journals ZnO1−xTex highly mismatched alloys beyond the dilute alloy limit: Synthesis and electronic band structure

2019 ◽  
Vol 125 (15) ◽  
pp. 155702 ◽  
Author(s):  
M. Ting ◽  
K. M. Yu ◽  
M. Jaquez ◽  
I. D. Sharp ◽  
Yifan Ye ◽  
...  
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Electronic Band ◽  
Highly Mismatched Alloys ◽  
Dilute Alloy
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