Abstract
This letter examines the pyro-phototronic effect in a photodetector based on PQT-12 and CdSe colloidal quantum dots (CQDs), operating under self-bias. The device employs a hybrid heterojunction between PQT-12 and CdSe CQDs, along with a Pd-electrode. The use of pyroelectric materials, such as CdSe and PQT-12, enhances the device’s efficiency by exploiting the pyro-phototronic effect observed during light transients. The investigation was conducted using both UV and white light sources, and the device demonstrated rapid response to UV light, with a rise and fall time of 14.18 and 28.32ms, respectively. At around 847 nm, the device achieved a maximum current density, and responsivity of 6.67×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-7</sup> <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">A/cm</i> <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , and 4.58 <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mA/W</i> , respectively. Additionally, the device’s optical properties were evaluated using the transfer matrix method to determine its suitability for wavelength-specific applications.
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