Nabeel Wahab Khan

1. Optimization of the emitter diffusion process for nanotextured surfaces. 2. The dependence of emitter on surface morphology. 3. The aspect ratio of texture is under investigation. 4. Emitter and surface morphology characterization techniques are used for investigations.

*Developing a diffusion process for the atmospheric pressure plasma-less Nano texture (ADE).* ADE texture with low reflection compared to standard textures has no customized diffusion process. The diffusion process parameters were optimized to decrease solar cell losses. Different characterization techniques including electrochemical capacitance voltage (ECV), quasi steady state photoconductance (QSSPC), four point probe (4PP) and others were used. Efficiency gain of 0.6% was achieved.

1. Optimization of dry nanotexture. 2. Trained for different characterization techniques including: i). Photoluminescence (used for surface defect analysis) ii). Spectroscopic ellipsometery (used for nano-layers thickness measurement) iii). Transfer length method technique (used for contact resistance measurement)

Sustainability studies on Power-to-gas and hydrogen gas injection into natural gas network and cost composition model of Electrolysis plant (100 KW-5 MW). Literature research included: 1. Methanation of hydrogen gas. 2. Embrittlement of steel by hydrogen gas. 3. Hydrogen liquifaction on industrial scale. 4. Hydrogen gas transport through pipelines. 5. Underground storage of hydrogen gas in caverns. 6. Manufacturer overview of trains with hydrogen fuel cells.

Energy systems, resilience engineering, lifecycle analysis and sustainability studies

Renewable energy, CAD, thermodynamics, design of machine elements

Chemistry, Physics, Mathematics