Chemical Sciences

Title :

Translating electrochromic deices to 1’x1’ dynamic windows: Towards industrial smart glass technologies

Area of research :

Chemical Sciences, Energy Sciences

Focus area :

Energy & Environment

Principal Investigator :

Dr Biswapriya Deb, Principal Scientist, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Kerala

Timeline Start Year :


Timeline End Year :


Contact info :


Executive Summary :

Objective: The project aims at translating the indigenously developed large area electrochromic device technology to 1’ x 1’ Dynamic Windows and Accelerated Life testing for industrial smart glass applications. Specific objectives are given below: Translate our expertise with large area electro chromic devices to Dynamic windows Immense commercial interest; Performance Index mapped in agreement with industrial partners; Accelerated life testing; Operational stability at 10-60°C; Cycle life >1000 under UV/Vis/NIR lights >80% write-erase efficacy; Feedback loop with industry under a material transfer agreement; Optimization of large area sealing, conductivity, uniform coloration and switching and pixelation in line with building integration requirements as specified by the industry; Performance demonstration and field trials in association with identified industry partner, TRL improvement, IP generation and technology/ transfer/licensing/sale; Construction of a prototype installation for demonstrating the feasibility of the developed modules, which will be in operation beyond the end of the project

Summary: Glazing of glass is the most viable pathway for saving indoor energy. With this objective and supported by an on-going FTT project, we have developed a novel spray coating process for large area thin film coating and demonstrated large scale electrochromic devices (15x15 cm2). We also achieved most of the proposed deliverables and rest should be ready by the project completion. Those objective were set after extensive consultation with the listed industries for demonstrating scalability of materials and processes. The fabricated EC devices are being characterised by single/ multi-color switching, superior optical contast (>80%), high coloration efficiencies (>200 cm2/C), low response times (<30 s) and low power consumption (-4.5 - +4.5V). Under non-disclosure agreements, the results were being shared and discussed with the stakeholders for industry inputs (Asahi India Glass and Sriram Industries). With our progress until now, the stackholders are positively convinced about the high potential of the technology-on-offer and the level of indigenization. They are in concurrence that most likely the NIIST developed process will meet all the set objectives by the project end. To take into commercial level and secure direct investment/ funding from industry, a translational of the developed large area EC technology into prototype dynamic windows is suggested by the stakeholders; in order to establish the life cycle, payback period and cost projection for product. The present proposal aims at continuing with our developed skill (and trained manpower for large area device fabrication) for translating the lare area EC devices to 1’x1’ dynamic windows followed by accelerated life time testing and performance demonstration. We also plan to contruct prototype installation for demonstrating the feasibility of the developed modules, which will be in operation beyong the end of the project. Field trials, point of care testing and certification will be done in association with Asahi India Glass Ltd. and the feasibility towards industrial scale smart glass technologies customized to India market will be demonstrated.

Organizations involved