![]() Akhil Alexander, Varun Srivastava, Poovannan Ravichandran, Vijith K Pulikodan, B Anitha, Alvin Joseph, Manoj A G Namboothiry.Intensity modulated photocurrent spectroscopy to investigate hidden kinetics at hybrid perovskite–electrolyte interface. Priya Srivastava, Ramesh Kumar, Hemant Ronchiya, Monojit Bag.The Journal of Physical Chemistry C 2019, 123 Effect of Light and Voltage on Electrochemical Impedance Spectroscopy of Perovskite Solar Cells: An Empirical Approach Based on Modified Randles Circuit. Xiaoqing Chen, Yasuhiro Shirai, Masatoshi Yanagida, Kenjiro Miyano.ACS Applied Materials & Interfaces 2019, 11 Low-Frequency Carrier Kinetics in Perovskite Solar Cells. Sangwan, Menghua Zhu, Sarah Clark, Kyle A. ![]() ACS Applied Materials & Interfaces 2020, 12 Unveiling the Morphology Effect on the Negative Capacitance and Large Ideality Factor in Perovskite Light-Emitting Diodes. Ramesh Kumar, Jitendra Kumar, Priya Srivastava, Dhanashree Moghe, Dinesh Kabra, Monojit Bag.Hybrid Perovskites with Larger Organic Cations Reveal Autocatalytic Degradation Kinetics and Increased Stability under Light. Role of A-Site Cation and X-Site Halide Interactions in Mixed-Cation Mixed-Halide Perovskites for Determining Anomalously High Ideality Factor and the Super-linear Power Law in AC Ionic Conductivity at Operating Temperature. Ramesh Kumar, Priya Srivastava, Monojit Bag.The Journal of Physical Chemistry C 2021, 125 Discerning the Role of an A-Site Cation and X-Site Anion for Ion Conductivity Tuning in Hybrid Perovskites by Photoelectrochemical Impedance Spectroscopy. Priya Srivastava, Ramesh Kumar, Monojit Bag.Hole Transport Bilayer for Highly Efficient and Stable Inverted Perovskite Solar Cells. Quantifying Capacitive and Diffusion-Controlled Charge Storage from 3D Bulk to 2D Layered Halide Perovskite-Based Porous Electrodes for Efficient Supercapacitor Applications. Impedance Spectroscopy of Metal Halide Perovskite Solar Cells from the Perspective of Equivalent Circuits. Antonio Guerrero, Juan Bisquert, Germà Garcia-Belmonte.Monolayer CVD Graphene Barrier Enhances the Stability of Planar p–i–n Organic–Inorganic Metal Halide Perovskite Solar Cells. Brandon Dunham, Drake Bal, Yooyeon Jo, Yuxi Wang, Christos Dimitrakopoulos.Elucidating Diiodomethane-Induced Improvement in Photonically Cured MAPbI3 Solar Cells. Copper Bromide Hole Transport Layer for Stable and Efficient Perovskite Solar Cells. Hamza Javaid, Nicholas Heller, Volodimyr V.ACS Applied Materials & Interfaces 2022, 14 Photorechargeable Hybrid Halide Perovskite Supercapacitors. Ramesh Kumar, Ankush Kumar, Prem Sagar Shukla, Ghanshyam Das Varma, D.This article is cited by 38 publications. Lastly, we extrapolate ion diffusion coefficients (∼10 –7 cm 2 s –1) and ionic conductivities (∼10 –7 S cm –1) from the Warburg mass (ion) diffusion response and show that, as the device degrades, there is an overall depletion of capacitive effects coupled with increased ion mobility. Furthermore, we show that a chemical double-layer capacitance buildup as a result of ion accumulation impacts the electronic properties of the device, likely by inducing either charge pinning or charge screening, depending on the direction of the ion-induced field. ![]() However, unlike observations in n-i-p devices, we found that there is a capacitive discharge leading to ion redistribution in the bulk at high forward biases. We show that ion migration is predictably influenced by a low applied forward bias, characterized by an increased capacitance at the hole-transporting (HTM) and electron-transporting material (ETM) interfaces, as well as in bulk. Using electrochemical impedance spectroscopy (EIS) and equivalent circuit modeling, we elucidated various resistive and capacitive elements in the device. We studied ion transport in hybrid organic–inorganic perovskite p-i-n devices as a function of applied bias under device operating conditions.
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