Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 55, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac29e3
Keywords
silicon nanocrystal; gel glass; photoluminescence; solar cell; down-conversion
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In addition to searching for new materials for next-generation solar cells, improving the efficiency of existing crystalline silicon-based photovoltaic modules is also crucial. This study used a silicon nanocrystal dispersed gel-glass as a luminescent down shifting material to enhance the efficiency of conventional solar cell modules.
Alongside the quest for new materials for development of next-generation solar cells, increasing the efficiency of the existing crystalline silicon-based photovoltaic module is of paramount importance. In this work we prepared a silicon nanocrystal (NC) dispersed gel-glass and used it as a luminescent down shifting material to enhance the efficiency of a conventional solar cell module. The synthesized gel-glass efficiently converts the unutilized high energy UV photons of the solar spectrum to blue-green photons and renders them amenable for effective carrier generation. An exceptionally high quantum yield (42.8%) of photon down conversion could be achieved with the luminescent silicon NCs. Following the insertion of the NC embedded gel-glass, the relative photon conversion efficiency and the short circuit current of the solar cell were found to increase by 6.48% and 4.2%, respectively. Further improvement of solar cell efficiency using this material could be achieved by optimized design and deposition and by optimizing the formation parameters of the gel-glass.
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