碳六十薄膜電性及場發射量測

Electric properties and Field Emission of C60 Films

廖健良(Jian-Liang Liao)

指導教授 ： 邱寬城

中原大學/理學院/應用物理研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400721

摘要

本文主要分為分為三個部分的量測。第一部分，透過介電性質的量測，我們發現碳六十薄膜，介電常數明顯隨著量測頻率下降而上升。而AC電導在相變前後的變化程度，隨著頻率下降而上升，也愈接近DC電導相變前後所變化的程度。第二部分，經由量測沈積在碳六十薄膜上的金膜的電導率，可以發現，在室溫下金膜不但電導率下降了30倍。而且在260K~300K間，呈現半導體的特性。在溫度在260K以下，金薄膜的電導率有約10個數量級的變化。第三部分，經由量測碳六十多晶薄膜場發射特性，我們發現其起始電場為0.2V/μm。

關鍵字

碳六十 ； 電導率 ； 場發射

並列摘要

This text is divided into the quantity which is divided into three parts and examined mainly. First part, by dielectric property measurement, we find dielectric constant of C60 films increases obviously as measurement frequency decreasing. And the change degree of AC conductivity before and after phase transition, increasing as frequency decreasing, and close to DC conductivity changes before and after phase transition. Second part, by measurement conductivity of gold overlayed C60 films , we find conductivity of gold overlayer decreases to conductivity of gold bulk by 30 times at the room temperature. And among 260K and 300K, the characteristic of the semiconductor appears. When under temperature 260K, the conductivity of gold overlayer has the changes of about 10 orders of magnitude. The third part, by measurement field emitting characteristic of C60 films field, we find their threshold fields are 0.2 V/μm.

並列關鍵字

conductivity ； field emission ； C60

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