Solution Processed Organic Transistors on Paper Substrate for Sustainable Electronics

Ecofriendly solution processed organic transistors were demonstrated on a biodegradable paper substrate for-5-V operation. Blend of solution processed organic semiconductor TIPS-pentacene and polystyr-ene (PS) polymer was utilized to form the active layer,along with a natural protein, i.e., gelatin as a primary gate dielectric, both of which offer eco-friendliness from process and material aspects. Fabricated organic transistors showed excellent transistor behavior for p-channel opera-tion with a maximum process transconductance value of 15 nF/Vs leading to the mobility of 2.3 cm(2)/Vs obtainedfrom capacitance density derived at 1 kHz. The average threshold voltage of-0.7 V suitable for low-voltage opera-tion was achieved along with decent ON/OFF current ratioof similar to 104. High electrical stability was demonstrated throughr epeatability of transfer characteristics and bias-stress measurements. Excellent environmental stability in normal ambient was observed up to seven weeks. These devices showed circuit applicability with decent switching in resistive load inverters and good sensitivity to ultraviolet (UV)light, making them a suitable candidate for exploration formultifunctional and disposable application.