由福勒公式描述异质结的电流-电压关系获得准确的热电流以得到本征肖特基势垒

EXPRESS THE RELATIONSHIP BETWEEN VOLTAGE AND CURRENT OF HETEROJUNCTION USING FOWLER EQUATION FOR ACCURY THERMAL EMISSION TO GET INTRINSIC SCHOTTKY BARRIER HEIGHT

为了利用热电流准确得到异质结的本征肖特基势垒高度,从能量等价吸收(转换)角度出发,将Fowler给出的描述金属光电流产额与入射光频率的关系进行变形,从而得到可能是真正刻画处于一定温度的异质结中正向电流同正向电压关系的函数。由此函数能自然地得到不为零的热电流。这样,根据理查德-杜什曼公式完全能够得到不敏感于温度的本征肖特基势垒高度。两个应用实例结果表明,该方法的计算结果高度可信。

The relationship of metal photocurrent yield and incident light frequency described by Fowler formula from en- ergy equivalent absorption was transformed to get precise intrinsic Schottky barrier height of heterojunctions by thermal emission. A function which would really depict the relation of forward current and forward voltage of heterojunctions at certain temperature was accepted. The nonzero thermal emission was determined by the function naturally. Thus the in- trinsic Schottky barrier height which is not sensitive to temperature can be obtained by Richardson-Dushman formula. The results of two applied examples prove that the proposed method is credible.