以電漿輔助化學氣相沉積儀成長奈米碳管應用於染料敏化太陽能電池之反電極

Abstract

本研究的主要目的是探討染料敏化太陽能電池之反電極，以直流電漿輔助化學氣相沉積儀，所成長的奈米碳管，來當作染料敏化太陽能電池之反電極。 在溫度350℃下，藉由鎳金屬催化層及直流電功率為實驗參數，5~40nm的鎳金屬催化層，100W和150W直流電功率，成長出不同樣貌的相異奈米碳管，並以SEM來量測其結構，來探討製程的參數與奈米碳管成長的樣貌。 由二氧化鈦薄膜吸附濃度為1.0×10-4M 的N719染料作為工作電極，Acetonitrile為溶劑，0.5M LiI、0.05M I2、0.5M tert-butyl pyridine(TBP)為電解質溶液，而以不同樣貌奈米碳管作為反電極組裝的染料敏化太陽能電池，由光電轉化效率量測系統，量取其效率，並探討不同樣貌奈米碳管對於染料敏化太陽能電池效率之影響。 最後以鎳金屬催化層5nm，150W直流電功率，所成長之奈米碳管，為最佳染料敏化太陽能反電極，其效率可達1.9%。

The main part of this dissertation is the study of carbon canotubes growth by DC-PECVD as counter electrode for dye-sensitized solar cells. At temperature 350℃, it will grow different types of CNTs by controling nickel metal catalyst layer from 5 to 40nm and with direct-current power , 100W and 150W. Structure and ingredients of the CNTs were studied by SEM. With regard to the producing method of working electrode, adsorbing dye molecules（N719 1.0×10-4M） on the TiO2 thin film；The liquid electrolyte 0.5M LiI, 0.05M I2, 0.5M tert-butyl pyridine (TBP) dissolving in Acetonitrile was used throughout this work；and then we used different types of CNTs on plate as counter electrode. Efficiency of DSSCs was measured by Photovoltaic Measurement System. The employment of different CNTS as counter electrodes was studied. CNTs growing on a 5nm nickel metal catalysis and with 150W direct-current power reached a efficiency of 1.9%. We found that to be the best choice for counter electrodes.