FREN
courbe en fond

Former staff and alumni



Main Research Activities

Organic-inorganic lead halide perovskites in particular CH3NH3PX3, have shown promise as cost effective high-performance materials for solution processed solar cells. The stability of the perovskites and high cost of hole-transporting materials (HTMs) are currently the bottleneck in the commercialization of organic-inorganic lead halide perovskite (CH3NH3PX3) based solar cells. My research focuses on the study of degradation mechanisms of the perovskites, improving the stability of the device and developing new cost effective and efficient HTMs.

Academic Training

- PhD (Aug. 2012 – Jan. 2017) in Material Science and Engineering, Nanyang Technological University, Singapore. Thesis Topic: Hole Transporting Materials for Methylammonium Lead Halide (CH3NH3PbI3) Perovskite Solar Cells. Supervisors: Assoc. Prof. Andrew Grimsdale and Assoc. Prof. Cesare Soci
- B.E. (2008 - 2012) in Chemical Technology and Polymer Science, Delhi College of Engineering, University of Delhi, India.

Selected Publications :

1.      A. Krishna, D. Sabba, H. Li, J. Yin, P. P. Boix, C. Soci, S. G Mhaisalkar, A. C Grimsdale, “Novel hole transporting materials based on triptycene core for high efficiency mesoscopic perovskite solar cells”-  Chemical Science, 2014, 5, 2702.

2.      A. Krishna, D. Sabba, Y. Jun, A. Bruno, P. P. Boix, H. A. Devi, G. Yang, G. G. Gurzadyan, C. Soci, S. Mhaisalkar, A. C. Grimsdale, “Facile synthesis of a furan-arylamine hole transporting material for high efficiency mesoscopic perovskite solar cells”- Chem. Eur. J, 2015, 21, 15113-15117.

3.      T. Salim, S. Sun, Y. Abe, A. Krishna, A. C Grimsdale, Y. M. Lam, “Perovskite-based solar cells: impact of morphology and device architecture on device performance” – J. Mater. Chem. A, 3, 8943-8969 (2015).

4.      A. Krishna, D. Sabba, Jun Yin, A. Bruno, L. J. Antila, C. Soci, S. Mhaisalkar, A. C. Grimsdale, “Facile synthesis of hole transporting material with silafluorene core for efficient mesoscopic CH3NH3PbI3 perovskite solar cells”- J. Mater. Chem. A 2016, 4, 8750-8754.

5.      J. Yin, D. Cortecchia, A. Krishna, S. Chen, N. Mathews, A. C Grimsdale, C. Soci, “Interfacial charge transfer anisotropy in polycrystalline lead iodide perovskite films”-J. Phys. Chem. Lett., 2015, 6 (8), 1396-1402.

 

 


Professional skills

- Synthesis of conjugated polymers and small molecules organic semiconductor for photovoltaic application.
- Characterization methods: Electron microscopy (SEM, TEM), spectroscopy (FTIR, UV/Vis, Mass, NMR), X-ray diffraction, cyclic voltammetry, solar cell characterization (I-V and IPCE), steady state and time resolved PL, Conductivity measurements using two and four probe method, differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA).
- Interpretation and Analysis: Transient absorption spectroscopy and Impedance spectroscopy.

Device fabrication: Mesoscopic organic-inorganic halide perovskite solar cells, Solid state dye sensitized solar cells (ss-DSSCs), and organic field effect transistors (FETs).

Mixed Dimensional 2D/3D Hybrid Perovskite Absorbers: The Future of Perovskite Solar Cells ?

Anurag Krishna, Sébastien Gottis, Mohammad Khaja Nazeeruddin, Frédéric Sauvage

Advanced Functional Materials, 2019

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