Light-Induced All-Transparent Pyroelectric Photodetector

In this work, we demonstrate a new concept for all oxide-based transparent photodetector by employing photoinduced pyroelectric effect. Particularly, a combination of n-type ZnO and p-type NiO heterostructure is used to design a red light-driven transparent photodetector. The device shows a high transmittance (>75%) and very low absorbance in the visible region. An open-circuit voltage of 1.8 V was measured across the detector with the pulsed light illumination (λ = 650 nm, 7 mW cm –2 ), which is attributed to the photoinduced pyroelectric effect. The thermometry images confirmed an increment in the surface temperature from 22.9 to 25 °C due to the illumination of pulsed 650 nm. The peak duration corresponding to pyrophototronic effect was 40 μs. This study will open a new avenue to design future advanced transparent optoelectronics devices, including solar cell, photodetectors, and transparent windows.