Partly Covered PProDOT-Me2 on MoS2 Nanosheets Counter Electrode for High-Performance Self-Powered Electrochromic Device,Advanced Materials Interfaces

当前位置： X-MOL 学术 › Adv. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Partly Covered PProDOT-Me2 on MoS2 Nanosheets Counter Electrode for High-Performance Self-Powered Electrochromic Device
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2021-11-10 , DOI: 10.1002/admi.202100945
Mahmoud A. Khalifa _{1,

2} , Kai Sheng ₁ , Zitao Wang ₁ , Jianming Zheng ₁ , Chunye Xu ₁

Affiliation

Developing a low-cost and transparent counter electrode (CE) for a self-powered electrochromic device (SP-ECD) can address the requirements of building-integrated photovoltaics (BIPVs). Herein, a new partly covered poly(3,4-(2,2-dimethylpropylenedioxy) thiophene) (PProDOT-Me₂) on MoS₂ nanosheets CE is developed for replacing an expensive Pt CE and achieving high-performance SP-ECD. The device consists of the proposed CE, an electrolyte containing Br⁻/Br₃⁻ redox pair, and a working electrode made with a dye-sensitized TiO₂ photoanode integrated with PProDOT-Me₂. ECD changes its color between deep blue and colorless by varying the illuminated light on and off. Measurements reveal that the ECD achieves a transmittance modulation of 46% at 580 nm with cycling stability over 500 cycles (4% contrast attenuation) that are about five times stable than that based on Pt or MoS₂ CE. In addition, the switching speed between colored and bleached states is fast under a light on and off, with a coloration time of 2.1 s and a bleaching time of 1.5 s. These characteristics result from the unique design of CE and can be beneficial in accelerating the electrochromic process and enhancing the self-powered performance for good cycling stability. This study reveals a new approach to prepare good CE for efficient SP-ECD in BIPVs.

中文翻译：

部分覆盖在 MoS2 纳米片上的 PProDOT-Me2 用于高性能自供电电致变色器件的反电极

为自供电电致变色器件 (SP-ECD) 开发低成本且透明的对电极 (CE) 可以满足建筑集成光伏 (BIPV) 的要求。在此，开发了一种在 MoS ₂纳米片 CE上部分覆盖的新型聚（3,4-（2,2-二甲基亚丙基二氧基）噻吩）（PProDOT-Me ₂），用于替代昂贵的 Pt CE 并实现高性能 SP-ECD。该装置由提议的 CE、包含 Br ^- /Br ₃^-氧化还原对的电解质和由染料敏化的 TiO _{2 光}阳极制成的工作电极与 PProDOT-Me ₂集成. ECD 通过改变照明光的开和关来在深蓝色和无色之间改变其颜色。测量表明，ECD 在 580 nm 处实现了 46% 的透射率调制，循环稳定性超过 500 次循环（4% 对比度衰减），其稳定性是基于 Pt 或 MoS ₂ CE 的约五倍。此外，在开灯和关灯下，着色和漂白状态之间的切换速度很快，着色时间为2.1 s，漂白时间为1.5 s。这些特性源于 CE 的独特设计，有利于加速电致变色过程并增强自供电性能以实现良好的循环稳定性。这项研究揭示了一种为 BIPV 中的高效 SP-ECD 制备良好 CE 的新方法。

更新日期：2021-11-11

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南