Drawing LEDs on your shirt
Paper and textiles hold great potential as platforms for next-generation flexible and wearable electronics
Researchers from the Department of Electrical & Systems Engineering, Washington University in St. Louis, have developed a way to draw multicolour perovskite light-emitting diodes and perovskite photodetectors on various substrates.
The method uses common ballpoint pens filled with newly formulated inks of conductive polymers, metal nanowires and multiple perovskites for a wide range of emission colours. Just like writing with multicoloured pens, writing layer-by-layer with these functional inks enables perovskite optoelectronic devices to be realized within minutes. This process can be carried out by individuals without specialized training. The handwritten perovskite light-emitting diodes can exhibit a brightness as high as 15,225 cd m−2, a current efficiency of 6.65 cd A−1 and a turn-on voltage of 2.4 V. The perovskite photodetectors exhibit an on/off ratio of over 10,000 and a responsivity of up to 132 mA W−1. This work offers a route to the integration of perovskite optoelectronics in low-cost and large-area application scenarios such as electronic textiles, electronic paper, smart packaging and other disposable electronics and wearables.
Their finding have been published in Nature.
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
