Research

1. Space-Grade Perovskite Solar Cells (Low Earth Orbit Applications)

• High-efficiency perovskite photovoltaics tailored for extreme space environments.

·         Fabrication of p-i-n structured perovskite solar cells with PCE > 27%
(Certified 24.7% at Newport, 2021)

·         Materials and interface engineering for vacuum stability, radiation tolerance, and thermal cycling (-150 to +150 °C)

·         Development of lightweight, high specific power (> 20 W g⁻¹ target) photovoltaic platforms

·         Advanced ETL/HTL engineering (SAM, polymer, metal oxide) for long-term operational durability

·         Solution-processed SnO₂, ZnO transport layers for scalable manufacturing

Objective:
Enable next-generation, high power-to-weight solar energy systems for LEO satellite platforms and space electronics.

2. Next-Generation Blue Perovskite & Organic LEDs

• Advanced light-emitting devices based on perovskite and organic semiconductors.

·         Fabrication of quasi-2D blue perovskite LEDs with improved spectral stability

·         Polymer-based OLEDs for low-power and dim-light applications

·         Interface engineering using ionic liquids, conjugated polyelectrolytes, and self-assembled monolayers (SAMs)

·         Performance enhancement via dipole moment modulation and charge injection control

·         Incorporation of Ag/Au metal nanocomposites for plasmon-enhanced emission and light extraction

·         Optimization of PEDOT:PSS and buffer layers for charge balance and device lifetime

Objective:
Realize high-efficiency, spectrally stable, and energy-efficient LEDs for display, lighting, and wearable electronics.

3. Infrared Quantum Dot Sensors & Hybrid Optoelectronics

• Solution-processed quantum dot platforms for IR sensing and hybrid optoelectronic systems.

·         Colloidal synthesis of AgBiS₂ quantum dots for near-IR detection

·         Microfluidic-controlled synthesis for uniform QD size distribution (CV < 10%)

·         Fabrication of Schottky and heterojunction quantum dot solar cells and sensors

·         Hybrid QD–organic (PCBM) architectures for enhanced charge separation

·         Ionic liquid and SAM insertion for improved interfacial energetics

·         Record QDSC PCE of 10.7% (2015)

Objective:
Develop scalable, high-sensitivity IR quantum dot sensors and hybrid energy-harvesting systems for next-generation photonic applications.