A Solid-State Light-Emitting Device Based on Excitations of Ballistic Electrons Generated in Nanocrystalline Porous Polysilicon Films
A Solid-State Light-Emitting Device Based on Excitations of Ballistic Electrons Generated in Nanocrystalline Porous Polysilicon Films
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基于纳米晶多孔多晶硅薄膜中产生的弹道电子激发的固态发光器件
DOI：
10.1143/jjap.41.2707
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发表时间：
2001
影响因子：
1.5
通讯作者：
N. Koshida
中科院分区：
文献类型：
--
作者：
Y. Nakajima;A. Kojima;H. Toyama;N. Koshida
在纳米晶多孔多晶硅（nc-PPS）薄膜中，利用场致电子漂移和荧光材料的激发，可以制备固态发光器件。该器件由半透明的金薄膜、有机荧光薄膜、nc-PPS薄膜、n型Si衬底和欧姆背触点组成。当对Au触点施加大于15 V的正偏置电压时，注入nc-PPS层的电子被加速向外表面运动，然后以准平衡电子或热电子的形式撞击荧光膜。这就产生了均匀的可见光发射，其光谱与沉积的荧光材料的原始发光光谱很好地吻合。从大面积应用的角度来看，用nc-PPS二极管观测光发射具有重要意义。该器件的潜在用途是作为硅基表面发光光源和真空平板显示器。
It has been demonstrated that a solid-state light-emitting device can be fabricated by field-induced electron drift in nanocrystalline porous polysilicon (nc-PPS) film and the subsequent excitation of fluorescent materials. The device is composed of a semitransparent thin Au film, an organic fluorescent film, a nc-PPS film, n-type Si substrate, and an ohmic back contact. When a positive bias voltage of higher than 15 V is applied to the Au contact, electrons injected into the nc-PPS layer are accelerated towards the outer surface, and then hit a fluorescent film as quasiballistic or hot electrons. This produces uniform visible light emission with the spectra of which coincide well with the original luminescence spectra of the deposited fluorescent material. Observed light emission with the nc-PPS diode is important from the viewpoint of large-area applications. Potential uses of this device are suggested as a silicon-based surface-emitting light source and a vacuumless flat panel display.