Aggregation Induced Emission Behavior in Oleylamine Acetone System and its Application to Get Improved Photocurrent from In₂S₃ Quantum Dots

This paper investigates the aggregation-induced emission behavior of an oleylamine-acetone system and its application in enhancing the photocurrent of In₂S₃ quantum dots (QDs). Aging of the oleylamine-acetone mixture led to the formation of nanoscale molecular clusters, self-assembling into flower-like aggregates with a red-shifted emission. This is attributed to exciton delocalization within the aggregates. The aging process also resulted in imine bond formation. The study explores the formation mechanism of these aggregates. Incorporating this aging process into In₂S₃ QD synthesis detached oleylamine from the QD surface, resulting in In₂S₃ QDs embedded in the oleylamine-acetone aggregates. Photoconductor devices using this hybrid system showed a significant increase in photocurrent, reaching the milliampere range, due to the improved charge transport facilitated by the conducting molecular aggregate matrix.

Subramaniam Ramya, Devaraj Nataraj, Sangameswaran Krishnan, Sellan Premkumar, Thankappan Thrupthika, Arumugam Sangeetha, Kittusamy Senthilkumar, T. Daniel Thangadurai