Ongoing Research Projects

1. Coherent Exciton Transport and Charge Transfer in Organic Semiconductors

Selected Publication:
Graphene Field-Effect Transistor as a High-Throughput Platform to Probe Charge Separation at Donor-Acceptor Interfaces

A scientific diagram showing electronic state transitions in a ZnPc/C₆₀ heterostructure. The left panel plots energy versus time, with states labeled S₁, CTh, CT₂, and CT₁, representing excited and charge transfer states. The right panel depicts a spatial schematic of an electron transferring from ZnPc (top) into C₆₀ (bottom), passing through the CT states.

2. Hybrid organic-2D van der Waals interfaces

Effect of the Interfacial Energy Landscape on Photo-induced Charge Generation at the ZnPc-MoS2 Interface

A diagram illustrating ultrafast charge transfer at a MoS₂/ZnPc interface. On the left, an incoming photon excites a molecule, with charge transfer occurring in about 80 femtoseconds, and recombination within 1–100 picoseconds. A molecular structure sits above the layered MoS₂ lattice. On the right, an energy diagram shows band positions (VBM, CBM, HOMO, S₁, T₁, and CT state) with timescales marked for the processes.

3. Hybrid-organometallic perovskite, nano-materials optoelectronic devices

Using Bulk-Heterojunction and Selective Electron Trapping to Enhance the Responsivity of Perovskite-Graphene Photodetector

A schematic of a perovskite photodetector device with graphene and gold electrodes. The left illustration shows perovskite grains with PCBM molecules embedded, generating electrons and holes under light. The right panel shows a log-log plot of photocurrent versus power, comparing pure perovskite with perovskite plus 0.1% and 1% PCBM. The added PCBM improves performance, indicated by distinct downward-sloping lines.