以鋁摻雜氧化鋅奈米柱作為電子傳輸層提升正型結構鈣鈦礦太陽能電池之效率

Abstract

本研究利用水熱法並首次以Al(NO3)3·9H2O作為鋁來源引入氧化鋅奈米柱晶格內以修飾氧化鋅奈米柱本質特性，並製作成鈣鈦礦太陽能電池。鋁摻雜氧化鋅奈米柱之X-ray繞射圖顯示其(002)晶格平面具有較大的2θ值和較強的繞射強度。也觀察到鋁摻雜氧化鋅奈米柱相對於未摻雜氧化鋅奈米柱具有較大的光學能隙和較高的電導率。穩態螢光光譜顯示在鋁摻雜氧化鋅奈米柱與鈣鈦礦層之接面具備有效的載子萃取與收集行為。經過優化之鋁摻雜氧化鋅奈米柱元件之開路電壓為0.84 V，短路電流密度為21.93 mA/cm2，填充因子為57%，功率轉換效率為10.45%，相較於未摻雜氧化鋅奈米柱元件高出23%。

In this study, we first incorporated Al(NO3)3·9H2O as the Al source into ZnO nanorods (NRs) lattice via the hydrothermal method to modify nature properties of ZnO NRs for the fabrication of perovskite solar cells (PSCs). The X-ray diffraction (XRD) pattern of Al-doped ZnO NRs exhibits higher 2θ values and stronger intensity of (002) plane. Larger optical band gap and higher electrical conductivity of Al-doped ZnO NRs are also observed relative to non-doped ZnO ones. The steady-state photoluminescence shows effective charge extraction and collection at the interface between Al-doped ZnO NRs and perovskite layer. The optimized device based on Al-doped ZnO NRs showed an open-circuit voltage of 0.84 V, a short-circuit current density of 21.93 mA/cm2, a fill factor of 57%, and a power conversion efficiency of 10.45% that was 23% higher than the non-doped ZnO ones.