R Suthar, Abhijith T  and S Karak, Machine-learning-guided prediction of photovoltaic performance of non-fullerene organic solar cells using novel molecular and structural descriptors, J. Mater. Chem. A, 2023, 11, 22248-22258

P Chhillar, A Kumar, B P Dhamaniya, K Chandratre, S Pareek, S K Pathak and S Karak, Understanding the role of Tris(2-aminoethyl)amine in stabilizing mixed-cation perovskites under humid and thermal stress conditions, J. Mater. Chem. C, 2023, 11, 16806-16817

R Suthar, Abhijith T, H Dahiya, A K Singh, G D Sharma, and S Karak, Role of Exciton Lifetime, Energetic Offsets, and Disorder in Voltage Loss of Bulk Heterojunction Organic Solar Cells, ACS Appl. Mater. Interfaces 2023, 15, 2, 3214–3223

R Suthar, T Abhijith, P Sharma, S Karak, Machine learning framework for the analysis and prediction of energy loss for non-fullerene organic solar cells, Solar Energy 250 (2023) 119–127

P Sharma, A Rana, Abhijith T., R Suthar, and S Karak, Accessing Deep Traps Distribution in FeS2-Doped Organic Photovoltaics, Energy Technol.2023,11, 2201087

T Abhijith , S Edappadikkunnummal, R Suthar, S Thomas and S Karak, Au–WS2 Nanohybrids with Enhanced Optical Nonlinearity for Optical Limiting Applications,ACS Appl. Nano Mater. 2023, 6, 4, 2327–2335

T Abhijith, R Suthar, S Karak, Synergistic Plasmonic Responses of Multi-Shaped Au Nanostructures Hybridized with Few-Layer WS2 Nanosheets for Organic Solar Cells,ACS Appl. Nano Mater. 2023, 6, 13, 11737–11746

A Kumar , B P Dhamaniya, S K Gupta, P Chhillar, K Chandratre, S K Pathak and S Karak, Revealing the impact of the host-salt non-stoichiometry on the performance of perovskite solar cells,Sustainable Energy & Fuels, 2023, 7, 4179-4188

A Kumar, S K Gupta, S K Pathak, S Karak, Controlling Nucleation and Crystal Growth Orientation via Intermediate Ion-Complex Formation for Efficient α-FA0.95Cs0.05PbI3 Perovskite Solar Cells, Energy Technology, 2024,12, 2300982

P Chhillar, BP Dhamaniya, SK Pathak, S Karak*, Stabilization of Photoactive γ-CsPbI3 Perovskite Phase by Incorporation of Mg, ACS Applied Electronic Materials 4 (11), 5368-5378

H Dahiya, R Suthar, K Khandelwal, S Karak*, GD Sharma*, Recent Advances in Organic and Inorganic Hole and Electron Transport Layers for Organic Solar Cells: Basic Concept and Device Performance, ACS Applied Electronic Materials 4 (11), 5119-5143

S Pareek, S Waheed, S Karak*, Graphitic Carbon Nitride Nanostructures as Molecular Modifier for PEDOT: PSS Hole Transport Layer in Polymer Solar Cells, IEEE Journal of Photovoltaics, (2022)

T Abhijith, E Shiju, R Suthar, P Sharma, S Thomas, S Karak*, Understanding the Linear and Nonlinear Optical Responses of Few-Layer Exfoliated MoS2 and WS2 Nanoflakes: Experimental and Simulation Studies, Nanotechnology,33, 43, (2022)

P. Sharma, E. Kelvin, A. Rana, S. Waheed, S. Pareek, and S. Karak*, Defects in Phase-Pure Iron Pyrite Nanocubes: Implications for Photovoltaics, IEEE Journal of Photovoltaics,11, 6 (2021)

A Rana, P Sharma, A Kumar, S Pareek, S Waheed, RK Singh, S Karak*, Understanding the Correlation Between Temperature Dependent Performance and Trap Distribution for Nickel Oxide Based Inverted Perovskite Solar Cells, , IEEE Transactions on Electron Devices (2021), 

P. Sharma, A. Rana, S. Waheed, S. Pareek, and S. Karak*, Defect Mediated Improved Charge Carrier Dynamics in Hybrid Bulk-Heterojunction Solar Cell Induced by Phase Pure Iron Pyrite Nanocubes, Nanotechnology 32 (2021) 265401. (IF = 3.5)

S. Waheed , S. Pareek, P. Singh , P. Sharma, A. Rana, and S. Karak*, Effect of In Situ Annealing on Phase Segregation And Optoelectronic Properties of Ultrasonic-Spray Deposited Polymer Blend Films, IEEE Journal of Photovoltaics, Vol. 10, No. 6, 2020.

S. Pareek, S. Waheed, A. Rana, P. Sharma and S. Karak*, Graphitic carbon nitride quantum dots (g-C3N4) to improve photovoltaic performance of polymer solar cell by combining Förster resonance energy transfer (FRET) and morphological effects, Nano Express 1 (2020) 010057.

S. Karak*, Z. A. Page, S. Li, J. S. Tinkham, P. M. Lahti, V. V. Duzhko and T. Emrick, Amino-fulleropyrrolidines as electrotropic additives to enhance organic photovoltaics, Sustainable Energy & Fuels, 2018, 2, 2143.

S. Karak, C. Nanjo, M. Odaka, K. Yuyama, G. Masuda, M. M. Matsushita and K. Awaga, " Perovskite based Plug and Play AC Photovoltaic Device with Ionic Liquid Induced Transient Opto-electronic Conversion ", J. Mater. Chem. A, (2016), 4, 9019, 2016 (Journal cover)

M. Bag, L. A Renna, R. Y Adhikari, S. Karak, F. Liu, P. M Lahti, T. P Russell, M. T Tuominen, D. Venkataraman, "Kinetics of Ion Transport in Perovskite Active Layers and It's Implications for Active Layer Stability", J. Am. Chem. Soc. 137, 13130 (2015).

S. Karak, Z. A. Page, T. Emrick, V. V. Duzhko, J. S. Tinkham, P. M. Lahti, "Raising Efficiency of Organic Solar Cells with Electrotropic Additives", Applied Physics Letters. 106 (10), 103303 (2015).

S. Karak, P. J. Homnick, A. M. Della Pelle, Y. Bae, V. Duzhko, F. Liu, T. P. Russell, P. M. Lahti, S. Thayumanavan, “Crystallinity and Morphology Effects on a Solvent-Processed Solar Cell Using a Triarylamine-Substituted Squaraine”, ACS Appl. Mater. Interfaces. 6 (14), 11376-11384, (2014).

 S. Karak, J. A Lim, V. V. Duzhko, and A. L. Briseno “Photovoltaic Effect at the Schottky Interface with Single Crystal Rubrene”, Adv. Func. Mater. 24, 1039 (2014), (Journal cover)

S. Karak, F. Liu, T. P. Russell and V. V. Duzhko, “Bulk Charge Carrier Transport in Push-Pull type Organic Semiconductor”, ACS Appl. Mater. Interfaces. 6 (23), pp 20904–20912 (2014) (IF=8.7)

S. Karak, S. K. Ray, and A. Dhar, “Photoinduced charge transfer and photovoltaic energy conversion in self-assembled N,N’-dioctyl-3,4,9,10-perylenedicarboximide nanoribbons”, Applied Physics Letters 97, 043306, (2010).

S. Karak, S. K. Ray, and A. Dhar, “Improvement of efficiency in solar cells based on vertically grown copper phthalocyanine nanorods”, Journal of Physics D: Applied Physics, 43, 245101, (2010).

(This article has been highlighted in ‘Nature India’ under Research Highlight section, “Tiny rods to harness solar energy”, doi:10.1038/nindia.2010.85; Published online 22 June 2010.)

S. Karak, S. K. Ray, and A. Dhar, “Improved photovoltaic properties of pentacene / N,N’-Dioctyl-3,4,9,10-perylenedicarboximide based organic heterojunctions with thermal annealing”, Solar Energy Materials & Solar Cells, 94, 836-841, (2010).

V. S. Reddy, S. Karak, S. K. Ray, and A. Dhar, “Carrier transport mechanism in aluminum nanoparticle embedded AlQ3 structures for organic bistable memory devices”, Organic Electronics, 10, 138-144, (2009).

V. S. Reddy, S. Karak, and A. Dhar, “Multilevel conductance switching in organic memory devices based on AlQ3 and Al/Al2O3 core-shell nanoparticles”, Applied Physics Letters 94, 173304, (2009).