Optoelectronic Polymers for Phototransistor Memory Devices
Series/Report No.
RSC Polymer Chemistry Series
Part Of
RSC Polymer Chemistry Series
Journal Volume
38
Start Page
158
End Page
191
ISBN
9781839166778
9781837673568
9781837673551
Date Issued
2024-10-02
Author(s)
DOI
10.1039/BK9781837673551-00158
Abstract
Herein, we have highlighted recent advances in OFET memory research and showcased their diverse applications including phototransistor memories and synaptic phototransistors. We described how phototransistors displaying strong hysteresis or low volatility can function as memory devices, while phototransistors with negligible hysteresis or high volatility can serve as effective detectors. Design concepts, criteria, and architectures of OFET memories were introduced, e.g., floating gate, photoactive polymer electret, and electret-free designs. A key strategy for achieving memory effects is to incoporate charge-storage sites in the form of semiconducting or metallic nanomaterials, or to sandwich polarizable organic/polymeric electrets between the semiconductor and dielectric layers. Three types of memory devices, i.e., floating gate, polymer electret, and electret-free, were also discussed. Floating gate and electret based OFETs hold significant promise for high-performance memory devices. Additionally, high performance phototransistor memories may be further advanced by utilizing floating gate electrets with QDs, polymer dots, and perovskite nanocrystals. Regarding electrets, we discussed various classes of polymers, e.g., (i) Π-conjugated block copolymers and (ii) photoluminescent polymers, and explored how their photoresponse and charge-retention capabilities can be rationally finetuned using structure-property relationships. Finally, electret-free OFET memories favorable for fast response applications, e.g., synaptic transistors, were described. In summary, this chapter aimed to provide a comprehensive guide to the latest developments in (photo)transistor memory science and engineering.
Publisher
Royal Society of Chemistry
Type
book part