鈣鈦礦型量子點之製備、鑑定及其在提升太陽能電池轉換效率之應用

The Synthesis and Characterization of Perovskite Quantum Dots and Their Application in Conversion Efficiency Enhancement of Silicon Solar Cells

劉銀欣(Y.H. Liu) ； 陳登銘(T.M. Chen)

《鑛冶：中國鑛冶工程學會會刊》 64卷2期 (2020/06) Pp. 81-91

https://doi.org/10.30069/MM.202006_64(2).08

摘要

鈣鈦礦型量子點為典型的具有寬吸收帶、窄發光半波寬、高量子效率及在可見光範圍發光波長可調控的奈米粒子，本研究以辛基磷酸（OPA）作為配位基合成了CsPbX_3（X = Br, I）-OPA/OAm鈣鈦礦型量子點，其量子效率及環境穩定性獲有效提升，實驗證實OPA能成功鈍化CsPbX_3量子點表面缺陷，提高其發光效率。我們進而以旋轉塗佈法將CsPbI_3-OPA/OAm量子點塗佈於兩種不同結構矽晶太陽能電池片上作為光譜下轉移層，並測量其電子顯微鏡影像、電流密度－電壓曲線與反射率，以探討量子點塗佈層提升矽基太陽能電池光電轉換效率之可行性。其中塗佈CsPbI_3-OPA/OAm量子點後，一般單晶矽太陽能電池片整體光電轉換效率增加3.63 %；而塗佈CsPbI_3-OPA/OAm量子點/PMMA後，無抗反射層單晶矽太陽能電池片整體光電轉換效率增加高達10.16 %。

關鍵字

CsPbX_3鈣鈦礦型量子點 ； 矽太陽能電池 ； 旋轉塗佈法 ； 電流密度－電壓曲線 ； 光譜轉換

並列摘要

Perovskite quantum dots, CsPbX_3 QDs (X = Br, I), are regarded as novel material with a broad absorption band, high quantum efficiency and adjustable emission wavelength in the visible range. We used octylphosphonic acid (OPA) as a ligand to synthesize CsPbX_3 (X = Br, I)-OPA/OAm to improve the quantum efficiency and environmental stability of the CsPbX_3 QDs. In this study, we used CsPbI_3-OPA/OAm QDs as a down-shifting layer by spin-coating on top of Si solar cells to convert the ultraviolet light to visible light with better spectral response of Si solar cells. We measured their current density (J)-voltage (V) curves and EQE to investigate their potential to promote photovoltaic conversion efficiency. Notably, with spin coating with CsPbI_3-OPA/OAm QDs, the energy conversion efficiency of single crystalline silicon solar cell increased by 3.63 %, and for the solar cell without antireflective layer the conversion efficiency increased by 10.16 %.

並列關鍵字

CsPbX_3 ； Perovskite Quantum Dots ； Si Solar Cells ； Spin Coating Method ； J-V Curve ； Spectral Conversion