Video-rate Switching Of High-Reflectivity Hybrid Cavities Spanning All Primary Colors.

Dynamically-tunable reflective structural colors are attractive for reflective displays (electronic paper). However, it has been challenging to tune a thin layer of structural color across the full red-green-blue (RGB) basis set of colors at video rates and with long-term stability. Here, this is achieved through a hybrid cavity built from metal-insulator-metal (MIM) "nano-caves" and an electrochromic polymer (PProDOTMe 2 ). The reflective colors are modulated by electrochemically doping/dedoping the polymer. Compared with traditional subpixel-based systems, this hybrid structure provides high reflectivity (> 40%) due to its "monopixel" nature, and switches at video rates. The polymer bistability helps deliver ultralow power consumption (∼2.5 mW cm -2 ) for video display applications and negligible values (∼3 μW cm -2 ) for static images, compatible with fully-photovoltaic powering. In addition, the color uniformity of the hybrid material is excellent (over cm -2 ) and the scalable fabrication enables large-area production . This article is protected by copyright. All rights reserved.