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Srinivasa Srimath

Researcher

Research Line

Advanced Materials for Optoelectronics

Center

CNST@PoliMi Milano

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About

Full name: Srinivasa Maruthi AJAY RAM SRIMATH KANDADA.
Born in 1986 in Tirupathi, India.
Nationality: Indian

Research Interests:

  • Photo-excitation dynamics in lead halide perovskites.
  • Advanced non-linear optical spectroscopy of semiconductors.
  • Entangled photon spectroscopy of excitonic correlations.

Technical Expertise:

  • Coherent non-linear spectroscopy.
  • Ultrafast pump-probe spectroscopy.
  • Time resolved photoluminescence spectroscopy/microscopy.
  • Electric field modulation spectroscopy.
  • Entangled photon generation and characterization.

Reseach Employment:

  • Sept 2018 - Present: Researcher, CNST IIT@Milano, Italy
  • July 2017 - August 2018: Visitinc researcher, Georgia Tech, USA
  • Oct 2016-Jun 2017: Post-doctoral Researcher, Universite de Montreal, Canada                          
  • May 2013 - Sept 2016: Post-doctoral Researcher, CNST, IIT@Milano, Italy
  • Feb 2010- March 2012: Marie-Curie Early Stage Researcher, Politecnico di Milano, Italy
  • Jan- Feb 2012: Visiting student, University of Sheffield, UK.
  • May-Dec 2009: Junior Research Fellow, Tata Institute of Fundamental Research, India.
  • April-June 2008: Summer Intern, National University of Singapore, Singapore

Education:

  • 2010 - 2013: PhD in Physics from Politecnico di Milano. (Thesis: Ultrafast dynamics in Molecular Agrregates and Interfaces)
  • 2007 - 2009: Masters in Physics from Sri Sathya Sai University, India. (CGPA: 5.00/5.00; Thesis: FDTD simulation of light confinement in Silver nano-cylinders).

Selected Publications

2018
  1. F. Thouin, D. Valverde-Chavez, C. Quarti, D. Cortecchia, I. Bargigia, D. Beljonne, A. Petrozza, C. Silva and A. R. S. Kandada, Phonon coherences reveal the polaronic character of the excitons in two-dimensional lead-halide perovskites, ArXiV: 1807:10539.
  2. S. Neutzner, F. Thouin, D. Cortecchia, A. Petrozza, C. Silva and A. R. S. Kandada, Exciton-polaron spectral structures in two-dimensional hybrid lead-halide perovskites. Phys. Rev. Mater., 2, 064605.
  3. H. Li, A. Piryatinski, A. R. S. Kandada, C. Silva, E. R. Bittner, Photon entanglement entropy as a probe of many-body correlations and fluctuations. ArXiv: 1805.07420.
  4. F. Thouin, S. Neutzner, D. Cortecchia, V. A. Dragomir, R. Leonelli, C. Soci, T. Salim, L. Y. Ming, A. Petrozza, A. R. S. Kandada and C. Silva, Stable bi-excitons in two-dimensional metal-halide perovskites with strong dynamic lattice disorder, Phys. Rev. Mater., 2, 034001.
  5. H. Li, A. Piryatinski, J. Jerke, A. R. S. Kandada, C. Silva, E. R. Bittner, Probing dynamical symmetry breaking using quantum-entangled photons, Quantum. Sci. Technol., 3, 015003.
  6. G. Batignani*, G. Fumero*, A. R. S. Kandada*, G. Cerullo, M. Gandini, C. Ferrante, A. Petrozza and T. Scopigno (* equal contribution), Probing femtosecond lattice displacement upon photo-carrier generation in lead halide perovskite, Nature Communications 9, 1971.
  7. I. Bargigia, E. Zucchetti, A. R. S. Kandada, M. Moreira, C. Bossio, W. P. D. Wong, P. B. Miranda, P. Decuzzi, C. Soci, C. D’Andrea and G. Lanzani, The photo-physics of polythiophene nanoparticles for biological applications, ChemBioChem (DOI: 10.1002/cbic.201800167) (suggested as Very Important Paper).

2017

  1. P. Grégoire, A. R. S. Kandada, E. Vella, C. Tao, R. Leonelli, C. Silva, Incoherent population mixing contributions to phase-modulation two-dimensional coherent excitation spectra, J. Chem. Phys., 147, 114201 (2017).
  2. D. Cortecchia, S. Neutzner, A. R. S. Kandada, E. Mosconi, D. Meggiolaro, F. De Angelis, C. Soci and A. Petrozza, Broadband emission in two-dimensional hybrid perovskites: the role of structural deformation, J. Am. Chem. Soc.,139, 39-42.
  3. P. J. Ceglielski, S. Neutzner, C. Porscharis, H. Lerch, J. Bolten, S. Suckow, A. R. S. Kandada, B. Chmielak, A. Petrozza and A. L. Giesecke, Integrated perovskite lasers on a silicon nitride waveguide platform by cost-effective high throughput fabrication, Optics Express, 25, 13100 – 13206.
  4. A. J. Barker, A. Sadhanala, F. Deschler, M. Gandini, S. P. Senanayak, P. M. Pearce, E. Mosconi, A. J. Pearson, Y. Wu, A. R. S. Kandada, T. Leijtens, F. De Angelis, S. E. Dutton, A. Petrozza and R. H. Friend, Defect-assisted photoinduced halide segregation in mixed halide perovskite thin films, ACS Energy Lett., 2, 1416-1424.
  5. C. Tao, J. Van Der Velden, L. Cabau, N. F. Montcada, S. Neutzner, A. R. S. Kandada, S. Marras, L. Brambilla, M. Tommasini, W. Xu, R. Sorrentino, A. Perinot, M. Caironi, C. Bertarelli, E. Palomares and A. Petrozza, Fully solution processed n-i-p like perovskite solar cells with planar junction: How the charge extracting layer determines the open circuit voltage, Adv. Mater., 1604493.

2016

  1. A. R. S. Kandada and A. Petrozza. Research update: Luminescence in lead halide perovskites, APL Materials, 4, 091506.
  2. A. R. S. Kandadaand A. Petrozza. Photophysics of hybrid lead halide perovskites: The role of microstructure, Acc. Chem. Res., 49, 536-544.
  3. A. R. S. Kandada, S. Neutzner, V. D’Innocenzo, F. Tassone, M. Gandini, Q. A. Akkerman, M. Prato, L. Manna, A. Petrozza and G. Lanzani, Non-linear carrier interactions in lead halide perovskites and the role of defects, J. Am. Chem. Soc., 138, 13806-13811.
  4. S. G. Motti, M. Gandini, A. J. Barker, J. M. Ball, A. R. S. Kandada and A. Petrozza. Photoinduced emissive trap states in lead halide perovskite semiconductors, ACS Energy. Lett., 1, 726-730.
  5. S. Neutzner, A. R. S. Kandada, G. Lanzani and A. Petrozza. A dual phase architecture for efficient amplified spontaneous emission in lead iodide perovskites, J. Mater. Chem. C., 4, 4630-4633.
  6. J. Shamsi, A. Abdelhady, S. Accornero, M. P. Arciniegas, L. Goldoni, A. R. S. Kandada, A. Petrozza, L. Manna, N-Methylformamide as a source of methylammonium ions in the synthesis of lead halide perovskite nanocrystals and bulk crystals, ACS Energy Lett., 1, 1042-1048.
  7. T. Leijtens, G. Eperon, A. J. Barker, G. Grancini, W. Zhang, J. M. Ball, A. R. S. Kandada, H. J. Snaith and A. Petrozza, Carrier trapping and recombination: the role of defect physics in enhancing the open circuit voltage of metal halide perovskite solar cells, Energy. Environ. Sci., 9, 3472-3481.
  8. Q. A. Akkerman, S. G. Motti, A. R. S. Kandada, E. Mosconi, V. D’Innocenzo, G. Bertoni, S. Marras, B. A. Kamino, L. Miranda, F. De Angelis, A. Petrozza, M. Prato, L. Manna. Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control by a Solution Synthesis ApproachJ. Am. Chem. Soc., 138, 1010-1016.
  9. M. De Bastiani, G. Dell’Erba, M. Gandini, V. D’Innocenzo, S. Neutzner, A. R. S. Kandada, G. Grancini, M. Binda, M. Prato, J. M. Ball, M. Caironi, and A. Petrozza,  Ion Migration and the Role of Preconditioning Cycles in the Stabilization of the J – V Characteristics of Inverted Hybrid Perovskite Solar Cells, Adv. Energy. Mater., 6, 1501453.

2015

  1. T. Leijtans, A. R. S. Kandada, G. Eperon, G. Grancini, V. D'Innocenzo, J. Ball, S. Stranks, H. J. Snaith and A. Petrozza, Modulating the electron-hole interaction in a hybrid lead halide perovskite with an electric field, J. Am. Chem. Soc., 137 (49), 15451-15459.
  2. G. Grancini*, A. R. S. Kandada*, J. Frost, A. Barker, M. De Bastiani, M. Gandini, G. Lanzani, A. Walsh and A. Petrozza (*contributed equally), Role of microstructure in the electron–hole interaction of hybrid lead halide perovskites, Nature Photonics, 9, 695-701.
  3. C. Tao, S. Neutzner, L. Colella, S. Marras, A. R. S. Kandada, M. De Bastiani, G. Pace, L. Manna, M. Caironi, C. Bertarelli, A. Petrozza, 17.6% steady state efficiency in low temperature processed planar perovskite solar cells, Energy. Environ. Sci., 8, 2365 - 2370.
  4. J. P. C. Baena, L. Steier, W. Tress, M. Saliba, S. Neutzner, T. Matsui, F. Giordano, T. J. Jacobsson, A. R. S. Kandada, S. M. Zakeeruddin, A. Petrozza, A. Abate, M. K. Nazeeruddin, M. Grätzel, A. Hagfeldt, Highly efficient planar perovskite solar cells through band alignment engineering, Energy. Environ. Sci., 8, 2928-2934.
  5. G. Grancini, V. D'Innocenzo, E. R. Dohner, N. Martino, A. R. S. Kandada, E. Mosconi, F. De Angelis, H. I. Karunadasa, E. T. Hoke, A. Petrozza. CH3NH3PbI3 perovskite single crystals: surface photo-physics and their interaction with the environment. Chem. Sci., 6, 7305-7310.

2014

  1. V. D’Innocenzo, A. R. S. Kandada, M. De Bastiani, M. Gandini, A. Petrozza, Tuning the light emission properties by band gap engineering in hybrid lead-halide perovskite, J. Am. Chem. Soc., 136 (51), pp 17730–17733.
  2. A. R. S. Kandada, A. Petrozza and G. Lanzani, Ultrafast dissociation of triplets in pentacene induced by an electric field, Phys. Rev. B., 90, 075310.
  3. V. D’Innocenzo, G. Grancini, M. J. P. Alcocer, A. R. S. Kandada, S. D. Stranks, M. M. Lee, G. Lanzani, H. J. Snaith, A. Petrozza. Excitons versus free charges in organo-lead tri-halide Perovskites. Nature Communications, 5, 3586.
  4. A. R. S. Kandada, S. Guarnera, F. Tassone, G. Lanzani and A. Petrozza. Charge generation at Polymer/Metal Oxide Interface: from molecular scale dynamics to mesoscopic effects. Adv. Func. Mater., 24, 3094.
  5. A. Abate, M. Planells, D. J. Hollman, S. D. Stranks, A. Petrozza, A. R. S. Kandada, Y. Vaynzof, S. K. Pathak, N. Robertson, H. J. Snaith, An organic donor-free dye with enhanced open-circuit voltage in solid-state sensitized solar cells. Adv. Energy. Mater., 4, 1400166.
  6. I. Kriegel, A. Wisnet, A. R. S. Kandada, F. Scotognella, F. Tassone, C. Scheu, H. Zhang, A. O. Govorov, J. Rodríguez-Fernández and J. Feldmann. Cation exchange synthesis and optoelectronic properties of type II CdTe-Cu2-xTe nano-heterostructures. J. Mater. Chem. C., 2, 3189-3198.

2013

  1. A. R. S. Kandada, G. Grancini, A. Petrozza, S. Perissinotto, D. Fazzi, S. S. K. Raavi and G. Lanzani. Ultrafast Energy Transfer in Ultrathin Donor/Acceptor Blend. Sci. Rep., 3, 2073.
  2. A. R. S. Kandada, S. Fantacci, S. Guarnera, D. Polli, G. Lanzani, F. De Angelis and A. Petrozza. Role of Hot Singlet Excited States in Charge Generation at the Black Dye/TiO2 Interface. ACS Appl. Mater. Interfaces, 5 (10), 4334–4339.
  3. G. Della Valle, F. Scotognella, A. R. S. Kandada, M. Zavelani-Rossi, H. Li, M. Conforti, S. Longhi, L. Manna, G. Lanzani and F. Tassone. Ultrafast Optical Mapping of Nonlinear Plasmon Dynamics in Cu2−xSe Nanoparticles. J. Phys. Chem. Lett., 4, 3337-3344.
  4. F. Scotognella, G. Della Valle, A. R. S. Kandada, M. Zavelani-Rossi, S. Longhi, G. Lanzani and F. Tassone. Plasmonics in heavily doped semiconductor nano crystals. Eur Phys J. B., 86, 154.

2012

  1. C. Sciascia, R. Castagna, M. Dekermenjian, R. Martel, A. R. S. Kandada, F. Di Fonzo, A. Bianco, et al. Light-Controlled Resistance Modulation in a Photochromic Diarylethene–Carbon Nanotube Blend. J. Phys. Chem. C., 116(36), 9483–9489.

2011

  1. F. Scotognella*, G. Della Valle*, A. R. S. Kandada*, D. Dorfs, M. Zavelani-Rossi, M. Conforti, K. Miszta, A. Comin, K. Korobchevskaya, G. Lanzani, L. Manna and F. Tassone (*contributed equally). Plasmon dynamics in colloidal Cu₂-xSe nanocrystals. Nano letters, 11(11), 4711– 4717.
  1. S. Perissinotto, M. Garbugli, D. Fazzi, C. Bertarelli, M. Carvelli, A. R. S. Kandada, Z. Yue, K.S. Wong and G. Lanzani. Optical Modulation of Amplied Emission in a Polyuorene-Diarylethene Blend. ChemPhysChem, 12(18), 3619-3623.

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I numeri di IIT

L’Istituto Italiano di Tecnologia (IIT) è una fondazione di diritto privato - cfr. determinazione Corte dei Conti 23/2015 “IIT è una fondazione da inquadrare fra gli organismi di diritto pubblico con la scelta di un modello di organizzazione di diritto privato per rispondere all’esigenza di assicurare procedure più snelle nella selezione non solo nell’ambito nazionale dei collaboratori, scienziati e ricercatori ”.

IIT è sotto la vigilanza del Ministero dell'Istruzione, dell'Università e della Ricerca e del Ministero dell'Economia e delle Finanze ed è stato istituito con la Legge 326/2003. La Fondazione ha l'obiettivo di promuovere l'eccellenza nella ricerca di base e in quella applicata e di favorire lo sviluppo del sistema economico nazionale. La costruzione dei laboratori iniziata nel 2006 si è conclusa nel 2009.

Lo staff complessivo di IIT conta circa 1440 persone. L’area scientifica è rappresentata da circa l’85% del personale. Il 45% dei ricercatori proviene dall’estero: di questi, il 29% è costituito da stranieri provenienti da oltre 50 Paesi e il 16% da italiani rientrati. Oggi il personale scientifico è composto da circa 60 principal investigators, circa 110 ricercatori e tecnologi di staff, circa 350 post doc, circa 500 studenti di dottorato e borsisti, circa 130 tecnici. Oltre 330 posti su 1400 creati su fondi esterni. Età media 34 anni. 41% donne / 59 % uomini.

Nel 2015 IIT ha ricevuto finanziamenti pubblici per circa 96 milioni di euro (80% del budget), conseguendo fondi esterni per 22 milioni di euro (20% budget) provenienti da 18 progetti europei17 finanziamenti da istituzioni nazionali e internazionali, circa 60 progetti industriali

La produzione di IIT ad oggi vanta circa 6990 pubblicazioni, oltre 130 finanziamenti Europei e 11 ERC, più di 350 domande di brevetto attive, oltre 12 start up costituite e altrettante in fase di lancio. Dal 2009 l’attività scientifica è stata ulteriormente rafforzata con la creazione di dieci centri di ricerca nel territorio nazionale (a Torino, Milano, Trento, Parma, Roma, Pisa, Napoli, Lecce, Ferrara) e internazionale (MIT ed Harvard negli USA) che, unitamente al Laboratorio Centrale di Genova, sviluppano i programmi di ricerca del piano scientifico 2015-2017.

IIT: the numbers

Istituto Italiano di Tecnologia (IIT) is a public research institute that adopts the organizational model of a private law foundation. IIT is overseen by Ministero dell'Istruzione, dell'Università e della Ricerca and Ministero dell'Economia e delle Finanze (the Italian Ministries of Education, Economy and Finance).  The Institute was set up according to Italian law 326/2003 with the objective of promoting excellence in basic and applied research andfostering Italy’s economic development. Construction of the Laboratories started in 2006 and finished in 2009.

IIT has an overall staff of about 1,440 people. The scientific staff covers about 85% of the total. Out of 45% of researchers coming from abroad 29% are foreigners coming from more than 50 countries and 16% are returned Italians. The scientific staff currently consists of approximately 60 Principal Investigators110 researchers and technologists350 post-docs and 500 PhD students and grant holders and 130 technicians. External funding has allowed the creation of more than 330 positions . The average age is 34 and the gender balance proportion  is 41% female against 59% male.

In 2015 IIT received 96 million euros in public funding (accounting for 80% of its budget) and obtained 22 million euros in external funding (accounting for 20% of its budget). External funding comes from 18 European Projects, other 17 national and international competitive projects and approximately 60 industrial projects.

So far IIT accounts for: about 6990 publications, more than 130 European grants and 11 ERC grants, more than 350 patents or patent applications12 up start-ups and as many  which are about to be launched. The Institute’s scientific activity has been further strengthened since 2009 with the establishment of 11 research nodes throughout Italy (Torino, Milano, Trento, Parma, Roma, Pisa, Napoli, Lecce, Ferrara) and abroad (MIT and Harvard University, USA), which, along with the Genoa-based Central Lab, implement the research programs included in the 2015-2017 Strategic Plan.