Electrically pumped lasing from single ZnO micro/nanowire and poly(3,4-ethylenedioxythiophene):poly(styrenexulfonate) hybrid heterostructures
Electrically pumped lasing from single ZnO micro/nanowire and poly(3,4-ethylenedioxythiophene):poly(styrenexulfonate) hybrid heterostructures
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DOI：
10.1063/1.4739430
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发表时间：
2012-07
影响因子：
4
通讯作者：
Qi Zhang;J. Qi;Xin Li;Fang Yi;Zengze Wang;Yue Zhang
中科院分区：
文献类型：
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作者：
Qi Zhang;J. Qi;Xin Li;Fang Yi;Zengze Wang;Yue Zhang
我们报告了通过在单个 ZnO 微/纳米线上注入电来驱动紫外线激光。通过将聚(3,4-乙撑二氧噻吩):聚(苯乙烯磺酸)(PEDOT:PSS)与单根ZnO线的一端接触来制造异质结。在~1 A/cm2 的激发注入下，电致发光光谱显示出近紫外激光作用。这种现象是基于回音廊模式来理解的，该模式是由穿过圆柱体边缘附近的多边形横截面的轨迹产生的。一些模式的减少与表面态或缺陷有关，并且低于ZnO本征激子发射的共振与聚合物/ZnO界面处的电子积累有关。
We report electrically driven ultraviolet lasing by electrical injection in a single ZnO micro/nanowire. Heterojunctions were fabricated by contacting poly(3,4-ethylenedioxythiophene): poly(styrenexulfonate) (PEDOT:PSS) with one end of a single ZnO wire. At an excitation injection of ∼1 A/cm2, the electroluminescence spectrum showed a near-ultraviolet lasing action. This phenomenon was understood based on whispering-gallery mode, which results from trajectories that traverse a polygonal cross-section near the edges of the cylinder. The reduction of some modes was associated with the surface states or defects and the resonance below the intrinsic exciton emission of ZnO is related to electron accumulation at the polymer/ZnO interface.