Hydrogen passivation effect on the conversion efficiency of Si solar cells by low-energy proton implantation

Parida, Bhaskar; Lim, Gyoungho; Choi, Jaeho; Palei, Srikanta; Kim, Keunjoo

doi:10.1016/j.solener.2015.08.041

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…It is known that such nonuniformities can arise from surface defects on the c-Si substrate, with recombination at these sites leading to low minority carrier lifetimes. 28 Compared to the nonpassivated c-Si substrate, much more uniform PL images were observed in every passivated c-Si substrate with mono-, dual-, and gradient-layered i a-Si:H passivation films, with all passivation structures showing similar levels of uniformity with a low RSD of around 9.00%. Since each passivation method showed similar uniformity, we conclude that the different results in passivation quality of i a-Si:H films as determined from minority carrier lifetime measurements were influenced primarily by the passivation scheme rather than nonuniformity.…”

Section: Resultsmentioning

confidence: 89%

Highly improved passivation of c-Si surfaces using a gradient i a-Si:H layer

Lee

Ahn

Mathew

et al. 2018

Journal of Applied Physics

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Surface passivation using intrinsic a-Si:H (i a-Si:H) films plays a key role in high efficiency c-Si heterojunction solar cells. In this study, we demonstrate improved passivation quality using i a-Si:H films with a gradient-layered structure consisting of interfacial, transition, and capping layers deposited on c-Si surfaces. The H 2 dilution ratio (R) during deposition was optimized individually for the interfacial and capping layers, which were separated by a transition layer for which R changed gradually between its values for the interfacial and capping layers. This approach yielded a significant reduction in surface carrier recombination, resulting in improvement of the minority carrier lifetime from 1480 ls for mono-layered i a-Si:H passivation to 2550 ls for the gradient-layered passivation approach. Published by AIP Publishing.

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Section: Resultsmentioning

confidence: 89%

Highly improved passivation of c-Si surfaces using a gradient i a-Si:H layer

Lee

Ahn

Mathew

et al. 2018

Journal of Applied Physics

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“…In DSSCs [4][5][6][7][8][9][10], nanoporous titanium-dioxide (TiO 2 ) [11][12][13][14][15] works with an electrolyte to generate a series of oxidation-reduction reactions which produce electricity. Unlike traditional solar cells made of silicon [16][17][18][19][20][21][22], the DSSC is made primarily of organic materials and is advantageous for its low cost and easy production.…”

Section: Introductionmentioning

confidence: 99%

Processes of Titanium-Dioxide Colloids for Working Electrodes of Dye-Sensitized Solar Cells

Lai

Chen

2017

AMM

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New titanium-dioxide (TiO2) colloids composed of nano-crystalline TiO2 and polydimethylsiloxane (PDMS) have been developed for use in the working electrodes of dye-sensitized solar cells (DSSCs). The surface morphology and electrical characteristics of the TiO2 colloid electrodes were studied. The analysis of the surface morphology of the TiO2 colloids was conducted by an atomic force microscope (AFM) and a field-emission scanning electron microscope (FE-SEM). The photovoltaic characteristics of the TiO2 colloids with different compositions were investigated. The TiO2 content of the colloids determined the photovoltaic conversion ability of DSSCs. Colorful colloids were implemented by adding pigments to the TiO2 colloids. The processes of the TiO2 colloids demonstrated the advantages of simple fabrication and low cost. The flexible property of the TiO2 colloids showed great potential for application in flexible optoelectronics.

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“…[2,3] Through the efforts of numerous researchers,t he application of hydrogen energy represented by direct combustionand hydrogen fuel cells has been improved dramatically.I np articular, hydrogen is becoming an important energy carrier and storage medium in fields such as transportation, the aerospace industry,a nd power generation. [4][5][6] Hydrogen is mainly produced by the gasificationo fC ÀHb onds at high temperature or the breaking of OÀHb onds of materials containing hydrogen, such as coal, petroleum, and natural gas;h owever, these hydrogen productionprocessesall require high input energy. [7] Lignite is at ype of coal with al ow degree of coalification but ar elatively high hydrogen content.…”

Section: Introductionmentioning

confidence: 99%

Production of Hydrogen‐Rich Syngas from Lignite using Different Pyrolysis Methods

Wang

Chen

2016

Energy Tech

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The efficiency of hydrogen production by the pyrolysis of lignite from Dongsheng in Inner Mongolia was investigated. Three pyrolysis methods, namely, temperature‐programmed pyrolysis, isothermal pyrolysis, and microwave pyrolysis, were applied and compared. The online analysis of the composition of the pyrolysis gas showed the effects of the different pyrolysis methods on the gas composition and the yield of hydrogen. The reasons were discussed on the basis of infrared thermography of the semicoke samples, FTIR spectroscopy, and SEM analysis. The microwave pyrolysis was improved by the addition of a shimming device to the furnace chamber. Consequently, the efficiency of hydrogen production by the pyrolysis of lignite was increased substantially, and the yield of hydrogen surged by 430 % compared with the yield for the original microwave pyrolysis.

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Hydrogen passivation effect on the conversion efficiency of Si solar cells by low-energy proton implantation

Cited by 8 publications

References 28 publications

Highly improved passivation of c-Si surfaces using a gradient i a-Si:H layer

Highly improved passivation of c-Si surfaces using a gradient i a-Si:H layer

Processes of Titanium-Dioxide Colloids for Working Electrodes of Dye-Sensitized Solar Cells

Production of Hydrogen‐Rich Syngas from Lignite using Different Pyrolysis Methods

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