High-efficiency (24.6% AM 0) LPE grown AlGaAs/GaAs concentrator solar cells and modules

Andreev, V. M.; Kazantsev, A. B.; Khvostikov, V. P.; Paleeva, E.V.; Rumyantsev, V.; Shvarts, М. Z.

doi:10.1109/wcpec.1994.521634

Cited by 8 publications

(9 citation statements)

References 2 publications

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“… 12 − 16 The high band gap layers could reduce the surface trap density and thus reduce photoluminescence (PL) decay rate 15 , 17 , 18 and improve the performance of GaAs-based devices. 19 − 21 Chemical passivation, such as sulfidation and nitridation by wet chemistry, is another typical and inexpensive passivation approach. 9 , 22 − 24 Sulfidation of the surface by wet chemistry improves the efficiency of solar cells.…”

Section: Introductionmentioning

confidence: 99%

Carrier Recombination Processes in GaAs Wafers Passivated by Wet Nitridation

Zou

et al. 2020

ACS Appl. Mater. Interfaces

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As one of the successful approaches to GaAs surface passivation, wet-chemical nitridation is applied here to relate the effect of surface passivation to carrier recombination processes in bulk GaAs. By combining time-resolved photoluminescence and optical pump—THz probe measurements, we found that surface hole trapping dominates the decay of photoluminescence, while photoconductivity dynamics is limited by surface electron trapping. Compared to untreated sample dynamics, the optimized nitridation reduces hole- and electron-trapping rate by at least 2.6 and 3 times, respectively. Our results indicate that under ambient conditions, recovery of the fast hole trapping due to the oxide regrowth at the deoxidized GaAs surface takes tens of hours, while it is effectively inhibited by surface nitridation. Our study demonstrates that surface nitridation stabilizes the GaAs surface via reduction of both electron- and hole-trapping rates, which results in chemical and electronical passivation of the bulk GaAs surface.

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Section: Introductionmentioning

confidence: 99%

Carrier Recombination Processes in GaAs Wafers Passivated by Wet Nitridation

Zou

et al. 2020

ACS Appl. Mater. Interfaces

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“…This theory was developed in the mid-1960s simultaneously in the USSR, Germany and the USA, respectively by V. K. Baranov [4] with the study of the focusing cones [5], Martin Ploke [6] and Roland Winston (United States) [7], and is the most used to today. Anidolic optics seeks to optimize the lighting produced by a source on a target without worrying about forming an image of the source.…”

Section: Non-imaging Opticsmentioning

confidence: 99%

Photovoltaic Concentration: Research and Development

et al. 2020

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Concentrator Photovoltaic (CPV) technology, by using efficient optical elements, small sizes and high efficiency multi-junction solar cells, can be seen as a bright energy source to produce more cost-effective electricity. The main and basic idea is to replace the use of expensive solar cells with less expensive optical elements made from different materials. This paper aims to give to the readers a rapid and concise overview of CPV and the main characteristics to be considered when designing a CPV system. It reviews the main optical configurations presented in the literature, their advantages and drawbacks, as well as the recent progress in the concentration ratio and the major performances achieved in the field. The paper considers the more recent works, their optical designs, as well as their optical and electrical performances. It also relates the major achievements on the industrial side with the major milestones in CPV developments.

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“…Their results also showed that due to secondary concentrator, the illumination on the surface of the solar cells was uniform. Andreev et al proposed a reflective 3D CPC with a convex lens as secondary concentrator for electricity generation. Experimental results showed that the convex lens on the base of the CPC increased the concentration ratio from 21× to 30×.…”

Section: Studies In the Literature On The Application Of Cpcs To Photmentioning

confidence: 99%

Application of compound parabolic concentrators to solar photovoltaic conversion: A comprehensive review

Paul

2019

Int J Energy Res

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Summary The use of concentrating systems has been proposed as a way to reduce the cost of electrical energy from photovoltaic (PV) module. Since 1970s, different solar collector designs have been used to increase energy flux on the PV module. This study aims at providing a comprehensive review of development in the application of compound parabolic concentrators (CPCs) to solar photovoltaic conversion for the past five decades. By narrowing down the application of CPCs to electrical energy only gives a reader an opportunity to clearly understand the detail development stages, challenges, and research opportunities for further improvement. From this review, it has been found that during 1970s, all studies on the application of CPCs to solar photovoltaic conversion were mainly focused on establishing technical feasibility and cost effectiveness. Thereafter (1981‐May 2018), extensive studies were carried out to resolve challenges that were observed during the establishment stage. However, it has been found that even though the power output of the PV modules with the CPC was always higher than similar modules without the CPC, the values were less than the expected (theoretical) results. This was due to optical losses, series resistance losses, non‐uniform illumination effect, and high operating cell temperature effect. In addition, high cost of the PV‐CPC systems and low concentration ratio of the CPCs were also the main concerns of various researchers.

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High-efficiency (24.6% AM 0) LPE grown AlGaAs/GaAs concentrator solar cells and modules

Cited by 8 publications

References 2 publications

Carrier Recombination Processes in GaAs Wafers Passivated by Wet Nitridation

Carrier Recombination Processes in GaAs Wafers Passivated by Wet Nitridation

Photovoltaic Concentration: Research and Development

Application of compound parabolic concentrators to solar photovoltaic conversion: A comprehensive review

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