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One‐Pot Gram‐Scale, Eco‐Friendly, and Cost‐Effective Synthesis of CuGaS2/ZnS Nanocrystals as Efficient UV‐Harvesting Down‐Converter for Photovoltaics
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-06-07 , DOI: 10.1002/aenm.201703418
Mohammed Jalalah 1, 2 , M. S. Al-Assiri 2 , Jea-Gun Park 1
Affiliation  

It is presented for the first time nontoxic CuGaS2/ZnS quantum dots (QDs) with free‐self‐reabsorption losses and large Stokes shift (>190 nm) synthesized on an industrially gram‐scale as an alternative for Cd‐based energy‐downshift (EDS)‐QD layers. The QDs exhibit a typical EDS that absorbs only UV light (<407 nm) and emits the whole range of visible light (400–800 nm) with a high photoluminescence‐quantum yield of ≈76%. The straightforward application of these EDS‐QDs on the front surface of a monocrystalline p‐type silicon solar cell significantly enhances the short‐circuit current density by ≈1.64 mA cm−2 (+4.20%); thereby, improving the power‐conversion‐efficiency by ≈4.11%. The significant improvement in the external quantum efficiency increases by ≈35.7% and that in the surface reflectance decreases by ≈14.1% in the UV region (300–450 nm) clearly manifest the photovoltaic enhancement. Such promising results together with the simple (one‐pot core/shell synthesis), cost‐effective (reduction in a bill of material–system by ≈2.62%), and scalable (2000 mL three‐neck flask, 11 g of QDs) preparation process might encourage the manufacturers of solar cells and other optoelectronic applications to apply these EDS‐QDs to different broader eco‐friendly applications.

中文翻译:

一锅克级,生态友好且经济高效的CuGaS2 / ZnS纳米晶体合成,作为光伏的高效UV收集下变频器

它是首次以工业克级合成的具有自由自重吸收损耗和大斯托克斯位移(> 190 nm)的无毒CuGaS 2 / ZnS量子点(QDs),替代基于Cd的能量下降位移(EDS)-QD层。QD表现出典型的EDS,其仅吸收紫外线(<407 nm),并发射可见光的整个范围(400–800 nm),且具有高的光致发光量子产率,约为76%。这些EDS-QD的直接应用在单晶p型硅太阳能电池的前表面上,可将短路电流密度显着提高约1.64 mA cm -2(+ 4.20%);因此,电源转换效率提高了约4.11%。在紫外线区域(300-450 nm),外部量子效率的显着提高增加了约35.7%,表面反射率的降低了约14.1%,这清楚地表明了光伏的增强。如此有希望的结果以及简单的(单锅核/壳合成),经济高效的(材料清单系统减少≈2.62%)和可扩展的(2000 mL三颈烧瓶,11 g QD)准备过程可能会鼓励太阳能电池和其他光电应用的制造商将这些EDS-QD应用于不同的更广泛的生态友好型应用。
更新日期:2018-06-07
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