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Research Fellows Directory

Ravichandran Shivanna

Dr Ravichandran Shivanna

Research Fellow


University of Cambridge

Research summary

Advancing the power conversion efficiency of solution processed low cost organic and inorganic hybrid solar cells is the core of my research. My doctoral work deals with exploring and understanding photo-charge generation in organic bulk heterojunction (BHJ) solar cells featuring non-fullerene acceptors. We have utilized a perylenediimide based acceptor with high electron mobility and extinction coefficient and achieved a power conversion efficiency of greater than 4.6 percent which is one among the highest performing fullerene-free organic solar cells. Photocharge generation dynamics in these cells are studied using ultrafast transient absorption measurement techniques (femto-micro second).

I have worked extensively with Near-field Scanning Optical Microscopy (NSOM) and different modes of Atomic Force Microscopy (AFM) to study structural, mechanical and electrical properties to map optoelectronic properties across donor-acceptor interface. With this expertise, my recent interest is to integrate near-field optical microscopy with ultra-fast transient techniques to study spatio-temporal mapping of charge generation across semiconducting nano-interfaces, "ultrafast optical microscopy", particularly on nanocrystals and its heterostructures.

Grants awarded

Ultrafast optical microscopy: Charge-dynamics in organic-inorganic perovskite solar cells

Scheme: Newton International Fellowships

Dates: Jun 2016 - Jun 2018

Value: £99,000