High‐Performance Flexible Bismuth Telluride Thin Film from Solution Processed Colloidal Nanoplates

• DOI: 10.1002/admt.202000600
• Publication Date: 2020-10-09T16:22:26Z
• Authors: Courtney Hollar; Zhaoyang Lin; Madhusudan Kongara; Tony Varghese; Chinnathambi Karthik; Jesse Schimpf; Josh Eixenberger; Paul H. Davis; Yaqiao Wu; Xiangfeng Duan; Yanliang Zhang; David Estrada
• Keywords: Bismuth telluride; Flexible Electronics; Thermoelectric generator; Bend radius; Flexible display

Thermoelectric generators are an environmentally friendly and reliable solid-state energy conversion technology. Flexible low-cost thermoelectric especially suited to power flexible electronics sensors using body heat or other ambient sources. Bismuth telluride based materials exhibit their best performance near room temperature making them ideal candidate wearable heat. In this report Bi2Te3 thin films deposited on a polyimide substrate scalable manufacturing methods. The synthesized nanocrystals have thickness of 35 ± 15 nm lateral dimension 692 186 nm. Thin fabricated from these peak factor 0.35 mW/m·K2 at 433 K, which is among the highest reported values for films. order evaluate flexibility films, static dynamic bending tests were performed while monitoring change in electrical resistivity. After 1000 cycles over 50mm ROC, resistance film was 23%. Using our solutions, we demonstrated ability print with aerosol jet printer, highlighting potential additive techniques fabricating generators.