掺杂C_(60)薄膜的制备及光电特性

Preparation and Electrical & Optical Properties of Doped C_ (60 ) Thin Films

在电弧法制备的过程中添加氮气或Ｂ２Ｏ３ 粉末，制备了氮、硼替位式掺杂Ｃ６０ 。硼掺杂和氮掺杂Ｃ６０ 均显示明显的半导体导电特性，且室温电导率比未掺杂Ｃ６０ 薄膜提高１ ～２ 个量级。用共蒸发的方法制备出了硫掺杂Ｃ６０ 薄膜，其电导率～温度曲线中存在一个过渡区，过渡区两侧表现出明显的半导体导电特性，这与掺入Ｃ６０ 薄膜中的硫杂质的存在状态有关。其室温电导率比掺杂前提高４个量级，光致发光也明显增强。另外还报道了用离子注入和射频等离子体辅助真空沉积的方法制备掺杂Ｃ６０ 薄膜的初步结果。

The boron doped and nitrogen doped C 60 thin films were prepared by arc discharge.The electrical transport behavior with the obvious semiconductive property has been shown in the boron doped and nitrogen doped C 60 films.The conductivity and activation energy of both doping C 60 films change little compared with that of pristine C 60 film.The sulfur doped C 60 films were deposited by simultaneous evaporation.The semiconductive property has also been confirmed from the room temperature to 368K and above 388K.A transition in the curve of conductivity versus temperature has been found at 368—388K,which could be attributed to the structure change of the sulfur.The conductivity increased by four orders of magnitude and photoluminescence was enhanced greatly.The initial investigations on preparation of doping C 60 films by ion implantation and RF plasma chemical vapor deposition were also reported.