Mapping the built-in electric field in polymer light-emitting electrochemical cells
Mapping the built-in electric field in polymer light-emitting electrochemical cells
复制标题
绘制聚合物发光电化学电池的内置电场
DOI：
10.1016/j.orgel.2011.12.010
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发表时间：
2012-03-01
影响因子：
3.2
通讯作者：
Gao, Jun
中科院分区：
文献类型：
--
作者：
Hu, Yufeng;Dorin, Bryce;Gao, Jun
在低温探针台中开启毫米平面聚合物发光电化学电池，随后冷却以冻结掺杂分布。由光纤引导的442 nm激光束扫描穿过几毫米的电极间间隙，并测量作为位置的函数的光伏响应。光电流和光电压曲线都在p型和n型掺杂区的几何边界处显示出显著的峰值。整个p型和n型掺杂区的非零光伏响应可以通过各种加宽机制来解释，包括非均匀掺杂和波导光的二次激发。光伏响应在电极/聚合物界面处最弱。(C)2011年爱思唯尔B。V.保留所有权利。
A millimeter planar polymer light-emitting electrochemical cell was turned on in a cryogenic probe station and subsequently cooled to freeze the doping profile. A 442 nm laser beam guided by an optical fiber was scanned across the interelectrode gap of several millimeters and the photovoltaic response was measured as a function of position. Both photocurrent and photovoltage profiles display a prominent peak at the geometric boundary of the p- and n-doped regions. A non-zero photovoltaic response throughout the p-and n-doped regions can be explained by various broadening mechanisms including non-uniform doping and secondary excitation by waveguided light. The photovoltaic response is weakest at the electrode/polymer interfaces. (C) 2011 Elsevier B. V. All rights reserved.