POS5-0967
Conjugated polymers with perovskite quantum dots via polarity adjustment for ultralow energy consumption photosynaptic transistors
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Wei Cheng Chen (National Taipei University of Technology)
Co-Author(s)
Abstract
Heterojunction-based photosynaptic transistors are promising for neuromorphic electronics because they can be easily integrated and directly respond to optical signals. However, efficient transfer of photogenerated carriers in organic/photosensitive heterojunctions remains a major challenge. In this work, we show that Sn doping in perovskite quantum dots (PeQDs) effectively tunes their bipolarity and regulates charge-trapping behavior in conjugated polymer (CP)–PeQDs nanocomposites. With optimal Sn doping, the PeQDs exhibited improved photoluminescence quantum yield and favorable energy-level alignment, enabling efficient electron trapping in p-type devices while suppressing undesired hole trapping in n-type systems. By integrating Sn-doped PeQDs with a p-type conjugated polymer, diketopyrrolopyrrole selenophene, we achieved excellent photosynaptic characteristics, including short-term plasticity, long-term plasticity, and spike-dependent plasticity. Notably, the optimized device delivered an ultralow energy consumption of 0.169 aJ, demonstrating a practical strategy for developing next-generation low-power neuromorphic optoelectronics.
