Electron Donor Ferrocenyl Phenothiazine: Counter Ion for Improving All-Organic Electrochromism,ACS Applied Electronic Materials

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Electron Donor Ferrocenyl Phenothiazine: Counter Ion for Improving All-Organic Electrochromism
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-09-01 , DOI: 10.1021/acsaelm.0c00606
Anjali Chaudhary ₁ , Madhurima Poddar ₂ , Devesh K. Pathak ₁ , Rajneesh Misra ₂ , Rajesh Kumar _{1,

3}

Affiliation

Electron-donating properties of 3-ferrocenylethynyl-10-propyl-10H-phenothiazine (FPP) has been studied to be used as an efficient counter ion for application in a viologen-based organic electrochromic device to facilitate an efficient all-organic electrochromic device. The FPP molecule, when used as a counter ion with viologen, improves the switching time to less than half a second and exhibits lower operation voltage of ∼1 V and excellent stability for longer than 1800 s with a negligible amount of absorption loss. Spectroscopic and electrochemical measurement techniques have been used to understand the mechanism of bias-induced enhanced performance of the FPP–viologen-based solid-state electrochromic device. The device does not contain any liquid electrolytic medium to support its switching behavior and can also be fabricated on a plastic substrate for realization of a flexible all-organic electrochromic device. The viologen–FPP electrochromic device showed an optical contrast of more than 55% with a bias of 0 to 1 V when switched between OFF- (transparent) and ON- (blue) states. An excellent value of coloration efficiency of 460 cm²/C is obtained with a simple all-solid device geometry arrangement, making it the most efficient solid-state electrochromic device in the viologen family of devices.

中文翻译：

电子给体二茂铁基吩噻嗪：用于改善全有机电致变色的反离子

3-二茂铁基乙炔基-10-丙基-10 H的给电子性质已经研究了吩噻嗪（FPP）作为有效的抗衡离子，用于基于紫精的有机电致变色器件中，以促进高效的全有机电致变色器件。当FPP分子用作与紫精的抗衡离子时，可将切换时间缩短至不到半秒，并具有约1 V的较低工作电压，并且在1800 s以上的时间内具有出色的稳定性，吸收损耗可忽略不计。光谱和电化学测量技术已被用于了解FPP-紫精基固态电致变色器件偏压引起的增强性能的机理。该装置不包含任何支持其转换行为的液体电解质介质，也可以在塑料基板上制造以实现柔性的全有机电致变色装置。当在OFF（透明）状态和ON（蓝色）状态之间切换时，viologogen-FPP电致变色设备显示出超过55％的光学对比度，偏压为0至1V。460厘米的出色着色效率通过简单的全固态器件几何结构可以获得² / C，使其成为紫精器件系列中最高效的固态电致变色器件。

更新日期：2020-09-22

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