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通过Alq_3∶CsF复合阴极缓冲层来优化CuPc/C_(60)有机小分子太阳能电池的性能。当Alq_3∶CsF厚度为5nm,CsF的掺杂比例为4%时,加入复合阴极缓冲层器件较Alq_3阴极缓冲层器件的能量转化效率提高了49%,到达0.76%,并且在室温、大气的条件下,器件的稳定性也得到了保持,与未加阴极缓冲层的器件相比,半衰期提高了6倍,达到9.8h。通过紫外-可见吸收、外量子效率和单载流子传输器件等研究了器件效率改善的主要原因是掺入CsF后,调节界面能级,改善了Alq_3的电子传输特性,提高了器件的短路电流和填充因子。比较分析复合阴极缓冲层器件于空气中放置不同的时间的电流电压曲线,表明Alq_3∶CsF可以保持Alq_3的良好稳定性,可以很好地阻挡氧气与水分的扩散,提高器件的寿命。 相似文献
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本文以Be(PP)2为发光层、水溶性酞菁铜(WS-CuPc)为空穴注入层、NPB为空穴传输层,制备了结构为ITO/WS-CuPc/NPB/Be(PP)2/LiF/Al的蓝色有机发光二极管(OLEDs).研究了WS-CuPc不同旋涂转速对器件性能的影响.并在WS-CuPc最佳旋涂转速的基础上,进一步研究了WS-CuPc薄膜不同退火方式对器件性能的影响.实验中,对WS-CuPc层采用了一种新的退火方式,即对ITO玻璃衬底先加热后旋涂WS-CuPc层,并与传统退火方式
关键词:
水溶性CuPc
蓝色有机电致发光
旋涂转速
退火方式 相似文献
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Performance improvement in pentacene organic thin film transistors by inserting a C60 ultrathin layer 下载免费PDF全文
The contact effect on the performances of organic thin film transistors is studied here. A C60 ultrathin layer is inserted between Al source--drain electrode and pentacene to reduce the contact resistance. By a 3 nm C60 modification, the injection barrier is lowered and the contact resistance is reduced. Thus, the field-effect mobility increases from 0.12 to 0.52 cm2/(V·s). It means that inserting a C60 ultra thin layer is a good method to improve the organic thin film transistor (OTFT) performance. The output curve is simulated by using a charge drift model. Considering the contact effect, the field effect mobility is improved to 1.15 cm2/(V·s). It indicates that further reducing the contact resistance of OTFTs should be carried out. 相似文献
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