Title: Sub‐0.6 eV Inverted Metamorphic GaInAs Cells Grown on Inp and GaAs Substrates for Thermophotovoltaics and Laser Power Conversion

Journal Article · · Advanced Energy Materials

Abstract Inverted metamorphic Ga 0.3 In 0.7 As photovoltaic converters with sub‐0.60 eV bandgaps grown on InP and GaAs are presented. Threading dislocation densities are 1.3 ± 0.6 × 10 6 and 8.9 ± 1.7 × 10 6  cm −2 on InP and GaAs, respectively. The devices generate open‐circuit voltages of 0.386 and 0.383 V, respectively, under irradiance producing a short‐circuit current density of ≈10 A cm −2 , yielding bandgap‐voltage offsets of 0.20 and 0.21 V. Power and broadband reflectance measurements are used  to estimate thermophotovoltaic (TPV) efficiency. The InP‐based cell is estimated to yield 1.09 W cm −2 at 1100 °C versus 0.92 W cm −2 for the GaAs‐based cell, with efficiencies of 16.8 versus 9.2%. The efficiencies of both devices are limited by sub‐bandgap absorption, with power weighted sub‐bandgap reflectances of 81% and 58%, respectively, the majority of which is assumed to occur in the graded buffers. The 1100 °C TPV efficiencies are estimated to increase to 24.0% and 20.7% in structures with the graded buffer removed, if previously demonstrated reflectance is achieved. These devices also have application to laser power conversion in the 2.0–2.3 µm atmospheric window. Peak laser power converter efficiencies of 36.8% and 32.5% are estimated under 2.0 µm irradiances of 1.86 and 2.81 W cm −2 , respectively.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
2281958
Report Number(s):
NREL/JA-5900-87628; 2303367
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 10 Vol. 14; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (38)

Applicability of Thermophotovoltaic Technologies in the Iron and Steel Sectors journal May 2018
Epitaxial Lift-Off for large area thin film III/V devices journal March 2005
68.9% Efficient GaAs‐Based Photonic Power Conversion Enabled by Photon Recycling and Optical Resonance journal May 2021
GaxIn1−xAs thermophotovoltaic converters journal June 1996
Strain relaxation and dislocations in SiGe/Si structures journal November 1996
High temperature ultra-small modular reactor: Pre-conceptual design journal June 2020
Ultra high temperature latent heat energy storage and thermophotovoltaic energy conversion journal July 2016
The development of (InGa)As thermophotovoltaic cells on InP using strain-relaxed In(PAs) buffers journal July 2008
Effects of dislocation strain on the epitaxy of lattice-mismatched AlGaInP layers journal April 2014
Preventing phase separation in MOCVD-grown InAlAs compositionally graded buffer on silicon substrate using InGaAs interlayers journal November 2017
Morphological characterization of GaAs islands grown on InGaAs by droplet epitaxy journal October 2022
Present Efficiencies and Future Opportunities in Thermophotovoltaics journal August 2020
Beaming power: Photovoltaic laser power converters for power-by-light journal February 2022
Efficient and scalable GaInAs thermophotovoltaic devices journal November 2022
Thermophotovoltaic energy in space applications: Review and future potential journal March 2017
Semiconductor-dielectric-metal solar absorbers with high spectral selectivity journal June 2022
Waste heat recovery technologies and applications journal June 2018
Six-junction III–V solar cells with 47.1% conversion efficiency under 143 Suns concentration journal April 2020
Near-perfect photon utilization in an air-bridge thermophotovoltaic cell journal September 2020
Thermal energy grid storage using multi-junction photovoltaics journal January 2019
Auger recombination in low-band-gap n -type InGaAs journal November 2001
Surface roughness and dislocation distribution in compositionally graded relaxed SiGe buffer layer with inserted-strained Si layers journal June 2005
Characterization and modeling of InGaAs/InAsP thermophotovoltaic converters under high illumination intensities journal March 2007
Relaxed, high-quality InP on GaAs by using InGaAs and InGaP graded buffers to avoid phase separation journal August 2007
Charged dislocation induced optical absorption in GaAs journal February 1989
The effect of dislocations on the optical absorption of heteroepitaxial InP and GaAs on Si journal June 1996
Reduction of crosshatch roughness and threading dislocation density in metamorphic GaInP buffers and GaInAs solar cells journal May 2012
Materials properties and dislocation dynamics in InAsP compositionally graded buffers on InP substrates journal April 2014
Inverted metamorphic AlGaInAs/GaInAs tandem thermophotovoltaic cell designed for thermal energy grid storage application journal October 2020
Ultraefficient thermophotovoltaic power conversion by band-edge spectral filtering journal July 2019
Lattice-Mismatched 0.7-eV GaInAs Solar Cells Grown on GaAs Using GaInP Compositionally Graded Buffers journal January 2014
Generalized Optoelectronic Model of Series-Connected Multijunction Solar Cells journal November 2015
Strategies for Thinning Graded Buffer Regions in Metamorphic Solar Cells and Performance Tradeoffs journal September 2018
Guided Optimization of Phase-Unstable III–V Compositionally Graded Buffers by Cathodoluminescence Spectrum Imaging journal January 2020
Operando Temperature Measurements of Photovoltaic Laser Power Converter Devices Under Continuous High-Intensity Illumination journal November 2023
Carrier Generation and Recombination in P-N Junctions and P-N Junction Characteristics journal September 1957
Relaxed GexSi1−x structures for III–V integration with Si and high mobility two-dimensional electron gases in Si journal July 1992
A Review on Thermophotovoltaic Cell and Its Applications in Energy Conversion: Issues and Recommendations journal August 2021