以非真空製程製備銅鋅錫硒（Cu2ZnSnSe4）薄膜於太陽能電池吸光材料之應用

本實驗是研究銅鋅錫硒（Cu2ZnSnSe4）薄膜在太陽能電池吸收層材料之應用。其製程是利用球磨法(Ball Milling)來製備成銅鋅錫硒前驅物漿料(Ink)，其二漿料(Ink)分別為CZTSe粉末和CuSe、ZnSe、SnSe粉末混合所形成，並以旋轉塗佈法(Spin Coating)於基材上形成Cu2ZnSnSe4前驅層，再置於爐管內進行(300~600℃)快速退火製程(RTP)，其熱處理時間不需太長，且可在不通入硒蒸氣或硒化氫等氣體下，藉由高溫擴散(Diffusion)，製備出具有Stannite結構之CZTSe薄膜，最後利用能量散射光譜儀分析薄膜成分、掃描式電子顯微鏡檢視薄膜表面形貌與橫截面、X光繞射分析儀判斷薄膜晶體結構、紫外光可見光分光光譜儀分析薄膜光學性質、螢光激發光譜儀分析薄膜能隙。由結果得知CZTSe薄膜在熱處理溫度500℃、持溫10min，即可得到具有較佳Stannite特性之CZTSe薄膜，其中CuSe、ZnSe、SnSe粉末比CZTSe粉末有較好結晶性，故有較大的晶粒，其能隙為1.01eV；而隨溫度升高其Cu/Zn+Sn值增加，往高角度(2θ)偏移、能隙值下降。

關鍵字

銅鋅錫硒；太陽能電池；球磨法；前驅層；漿料

並列摘要

The thesis is investigated on the application of Cu2ZnSnSe4 for solar cell absorber layer materials.In this study, two categories of ink, one consists of Cu2ZnSnSe4 (CZTSe) particles and the other is copper selenide (Cu–Se)、zinc selenide (Zn–Se) with tin selenide (Sn–Se) particles are investigated.The ink is prepared using wet-ball milling,and then the ink is deposited on a substrate to form a precursor layer by spin coating.The precursor layer is placed in RTP furnace, and then heated at the temperature between 300℃and 600℃ to form the compound layer with stannite structure that fabricating CZTSe thin film without long heat treatment and selenization.Finally elemental composition of films was determined using EDS, surface morphology and cross-section of the films were observed by SEM, and crystal structure was analyzed by XRD optical properties of films was recorded using UV-vis-NIR spectrophotometer, the band gap energy of films according to the PLE.Based on the analysis results of this experiment,CZTSe thin film with stannite structure can be obtained by heating at 500℃ for 10 minutes. It is found that the Cu–Se、Zn–Se with Sn–Se particles show higher crystallinity with a larger grain size,and the band gap is 1.01 eV. Cu/Zn+Sn values increase with increasing temperature, the shift to a higher angle (2θ) and the energy gap decreased.

並列關鍵字

CZTSe ； solar cell ； Ball Milling ； Precursor ； Stannite ； Ink

參考文獻

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以非真空製程製備銅鋅錫硒（Cu2ZnSnSe4）薄膜於太陽能電池吸光材料之應用

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