利用熱蒸鍍法成長ITO/CuPc/C60/Ag 異質結構並探討其物理特性

A study on the properties of ITO/CuPc/C60/Ag heterostructures prepared by thermal evaporation

墜律廷(Liu-Ting Juey)

指導教授 ： 邱寬城

中原大學/理學院/應用物理研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700865

摘要

本文利用物理汽相沉積法（真空度約2e10-5 torr），由改變粉末端溫度Tsou （CuPc 約330～360℃ ，C60 約 400～460℃ ）與基板溫度Tsub（30 與 90℃ ），製備 ITO/CuPc/C60/Ag 異質接面之有機小分子太陽能電池。在有機薄膜的物性量測方面，我們將藉由原子力顯微鏡、X-ray 繞射分析、電性量測及光學量測，分別探討有機薄膜層（一層接一層）的表面形貌、薄膜結構、I-V特性及電子吸收光譜。首先，在不同的成長條件下（Tsou 、Tsub 的改變），觀察薄膜的成長速率及膜厚。然後，探討各有機層的特性和ITO/CuPc CuPc/C60 之間的界面性質，與Tsou 、Tsub 及膜厚的關係。再來
，量測ITO/CuPc/C60/Ag於照光情況下，其短路電流（Isc）、開路電壓（Voc）及Isc的光譜分析。最後，
我們將討論照光產生的激子的傳輸及分離機制。

關鍵字

成長條件 ； 太陽能電池 ； 物理汽相沉積法

並列摘要

Small-molecule organic photovoltaic cells (OPVCs)
with a heterostructure of indium tin oxide(ITO)
/copper phthalocyanine (CuPc)/C60/metal were fabricated by physical vapor deposition (under vacuum level of about 2e10-5 torr) at different source temperatures Tsou (in between 330-360℃ for CuPc; and 370-460℃ for C60) and substrate temperatures Tsub (in between 30 and 90℃). The physical properties of these as-deposited organic thin films including surface morphology, structural information, and electrical and optical properties were measured ( in layer by layer sequence) by atomic force microscopy, X-ray diffraction, current-voltage characteristics, and electronic absorption spectra. At first, the effects of different deposition conditions ( Tsou and Tsub ) on growth rate and film-thickness of these organic thin films were examined. Then, the physical properties of each organic thin film as well as the interface properties of ITO/CuPc and CuPc/
C60 were studied with respect to Tsou, Tsub, and film-thickness. The short circuit current Isc and open circuit voltage Voc for this ITO/CuPc/
C60/metal hetero-structure under illumination were performed, and the spectral response of Isc was analyzed. Finally, a mechanism for the transport and separation of the photo-generated excitons was discussed

並列關鍵字

growth models ； solar cells ； physical vapor deposition

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