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首页> 外文期刊>RSC Advances >Dynamic interplay of alkali cations and a natural organic binder in the microstructural evolution of Cu2ZnSnS4 thin films prepared from Cu2ZnSnS4 powder-containing inks
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Dynamic interplay of alkali cations and a natural organic binder in the microstructural evolution of Cu2ZnSnS4 thin films prepared from Cu2ZnSnS4 powder-containing inks

机译：碱阳离子和天然有机粘合剂在Cu2ZNSS4含粉型油墨制备的Cu2zNSNS4薄膜微结构演化中的动态相互作用

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The use of pre-synthesised Cu2ZnSnS4 (CZTS) sub-micron powders as a raw material for preparing CZTS thin films for photovoltaic absorber applications is examined. A challenge in preparing photovoltaic device-relevant CZTS films from submicron powders is producing a dense CZTS film by a sintering process. This is due to the nature of non-unimodal particle size and morphology that typically lead to the formation of pores after sintering. This work aimed to study the sintering behaviour of CZTS films that were prepared from a CZTS powder-containing ink. Complementary DT-TGA and in situ X-ray powder diffraction studies at elevated temperature reveal that the tetragonal kesterite phase in the as-sintered CZTS film is stable until 620 degrees C. An effective tendency of CZTS powder towards film recrystallisation occurs when alkali cations (Na and/or K) are added to the ink. For the first time, effects of additional natural gum as a binder in the CZTS powder-containing ink on the CZTS film sintering behaviour were also investigated. Contrary to the positive effects of alkali addition, the binder inhibits recrystallisation of CZTS. Therefore, the amount of binder was controlled in a quantity large enough to modify the ink viscosity, but low enough to allow large CZTS grain growth during sintering. A dense and compact as-sintered CZTS film can be produced from a CZTS powder-containing ink with 10 mol% Na and 2 mol% K alkali addition along with 3 wt% binder addition.
机译：研究了使用预合成的Cu2zNSS4（CZTS）亚微米粉末作为用于制备用于光伏吸收器应用的CZTS薄膜的原料。在亚微米粉末制备光伏器件相关的CZTS薄片方面的挑战是通过烧结过程产生致密的CZTS膜。这是由于非单峰粒度的性质和烧结后通常导致孔隙形成的性质。这项工作旨在研究由CZTS含有CZTS粉末油墨制备的CZTS膜的烧结行为。互补的DT-TGA和原位X射线粉末衍射研究在升高的温度下表明，当烧结的CZTS膜中的四方keterite相直至620℃。当碱阳离子时，CZTS粉末掺入膜重结晶的有效趋势将Na和/或k）加入油墨中。还研究了第一次，还研究了CZTS膜烧结行为上的CZTS粉末油墨中作为含有CZTS粉末的粘合剂的额外天然胶的影响。与碱添加的正效应相反，粘合剂抑制CZT的重结晶。因此，将粘合剂的量控制在足够大的量以改变油墨粘度，但足够低以允许烧结期间的大型CZTS晶粒生长。可以从含CZTS粉末的油墨制备致密且紧凑的和烧结的CZTS膜，其中10mol％Na和2mol％K碱加成以及3wt％的粘合剂加成。

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    《RSC Advances》 |2019年第49期|共8页
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  • 正文语种 eng
  • 中图分类 化学;
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