Polythiophene-PCBM-Based All-Organic Electrochromic Device: Fast and Flexible
Polythiophene-PCBM-Based All-Organic Electrochromic Device: Fast and Flexible
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DOI：
10.1021/acsaelm.8b00012
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发表时间：
2019-01-01
影响因子：
4.7
通讯作者：
Kumar, Rajesh
中科院分区：
文献类型：
--
作者：
Chaudhary, Anjali;Pathak, Devesh K.;Kumar, Rajesh
本文报道了一种快速、灵活的全有机电致变色器件，它以聚噻吩酮和PCBM为活性材料，以塑料为衬底，具有很好的功率效率。使用开关速度、着色效率、颜色对比度和循环寿命等参数，该设备在电致变色性能方面显示出可量化的改进。利用拉曼光谱和紫外可见光谱研究建立了偏置诱导氧化还原开关的机理，从而改善了器件的性能。该器件在洋红(关闭)和透明状态(打开)之间切换，偏置非常小，+/-1V，光学调制50%，吸光度切换对比度为91%。据报道，在超过2500个S周期和250个周期的时间内，稳定性得到了增强，超快响应达到了几百毫秒。实现了321 cm(2)/C的高着色效率，使该器件成为报道最好的基于P3HT的电致变色器件之一。
A fast and flexible all-organic electrochromic device, fabricated using polythiophene and PCBM as active materials and plastic substrate, which shows very good power efficiency as well, has been reported here. The device shows quantifiable improvement in electrochromic performance using parameters like switching speed, coloration efficiency, color contrast, and cycle life. Spectroscopic investigations have been carried out using Raman and UV-vis to establish a bias induced redox switching based mechanism for the reported improvement in the performance. The device shows switching between magenta (OFF) and transparent states (ON) with a very small bias of +/- 1 V, an optical modulation of 50% and an absorbance switching contrast of 91%. An enhanced stability for a duration of longer than 2500 s and 250 cycles has been reported with an ultrafast response of few hundred milliseconds. A very high coloration efficiency of 321 cm(2)/C is achieved, making the proposed device one of the best reported P3HT-based electrochromic devices.