On this page, you can find our most recent publications and conference participation. Last update: October 2022.
Contact us for an electronic copy.
Publications
2024
Nirav Annavarapu, Iakov Goldberg, Sarah Hamdad, Karim Elkhouly, Renaud Puybaret, Deniz Sabuncuoglu Tezcan, Jan Genoe, Robert Gehlhaar, Paul Heremans , "Four‐Dimensional Design Space of High‐Q Second‐Order Distributed Feedback Perovskite Lasers". Adv. Optical Mater 2024, website
Karim Elkhouly, Iakov Goldberg, Xin Zhang, Nirav Annavarapu, Sarah Hamdad, Guillaume Croes, Cedric Rolin, Jan Genoe, Weiming Qiu, Robert Gehlhaar, and Paul Heremans, "Electrically assisted amplified spontaneous emission in perovskite light-emitting diodes". Nature Photonics 2024, pdf, website,
with a News & Views by B.P. Rand and N.C. Giebink "A bit of gain, electrically injected."
2023
Rokas Gegevičius, Karim Elkhouly, Marius Franckevičius, Jevgenij Chmeliov, Iakov Goldberg, Robert Gehlhaar, Weiming Qiu, Jan Genoe, Paul Heremans, and Vidmantas Gulbinas, "Electric Field-Induced Quenching of MAPbI3 Photoluminescence in PeLED Architecture". ACS Appl. Mater. Interfaces 2023, website
Yiyue Zhang, Lata Chouhan, Eduard Fron, Luca Leoncino, Karim Elkhouly, Harshita Bhatia, Weiming Qiu, Maarten B.J. Roeffaers, Johan Hofkens, Elke Debroye, and Bapi Pradhan, "Operationally Stable and Efficient CsPbI3–xBrx Perovskite Nanocrystal Light-Emitting Diodes Enabled by Ammonium Ligand Surface Treatment". ACS Photonics 10, 2023, website
Xin Zhang, Weiming Qiu, Sofia Apergi, Shivam Singh, Paulo Marchezi, Wenya Song, Christian Sternemann, Karim Elkhouly, Dong Zhang, Aranzazu Aguirre, Tamara Merckx, Anurag Krishna, Yuanyuan Shi, Andrea Bracesco, Cristian van Helvoirt, Frennie Bens, Valerio Zardetto, Jan D’Haen, Anran Yu, Geert Brocks, Tom Aernouts, Ellen Moons, Shuxia Tao, Yiqiang Zhan, Yinghuan Kuang, and Jef Poortmans, "Minimizing the Interface-Driven Losses in Inverted Perovskite Solar Cells and Modules" ACS Energy Letters 8, 2023, website
Nirav Annavarapu, Iakov Goldberg, Athina Papadopoulou, Karim Elkhouly, Jan Genoe, Robert Gehlhaar, Paul Heremans, "Scattered Emission Profile Technique for Accurate and Fast Assessment of Optical Gain in Thin Film Lasing Materials". ACS Photonics 10, 2023, website
Iakov Goldberg, Nirav Annavarapu, Simon Leitner, Karim Elkhouly, Fei Han, Niels Verellen, Tibor Kuna, Weiming Qiu, Cedric Rolin, Jan Genoe, Robert Gehlhaar, and Paul Heremans, "Multimode Lasing in All-Solution-Processed UV-Nanoimprinted Distributed Feedback MAPbI3 Perovskite Waveguides". ACS Photonics 10, 2023, website
2022
Rossa Mac Ciarnáin, Hin Wai Mo, Kaori Nagayoshi, Hiroshi Fujimoto, Kentaro Harada, Robert Gehlhaar, Tung Huei Ke, Paul Heremans, Chihaya Adachi, "Thermally Activated Delayed Fluorescence Green OLED with 4500 hours Lifetime and 20% External Quantum Efficiency by Optimizing the Emission Zone Using A Single-Emission Spectrum Technique", Adv. Mater. 2022, 2201409, website, pdf
Karim Elkhouly, Iakov Goldberg, Nirav Annavarapu, Robert Gehlhaar, Tung-Huei Ke, Jan Genoe, Johan Hofkens, Paul Heremans, and Weiming Qiu, "Intense Electrical Pulsing of Perovskite Light Emitting Diodes under Cryogenic Conditions", Adv. Optical Mater. 2022, 2200024, website
2021
Jevgenij Chmeliov, Karim Elkhouly, Rokas Gegevičius, Lukas Jonušis, Andrius Devižis, Andrius Gelžinis, Marius Franckevičius, Iakov Goldberg, Johan Hofkens, Paul Heremans, Weiming Qiu and Vidmantas Gulbinas, "Ion Motion Determines Multiphase Performance Dynamics of Perovskite LEDs", Adv. Optical Mater. 2021, 2101560, website, pdf
Iakov Goldberg, Weiming Qiu, Karim Elkhouly, Nirav Annavarapu, Ankit Nalin Mehta, Cedric Rolin, Tung-Huei Ke, Robert Gehlhaar, Jan Genoe and Paul Heremans, "Active area dependence of optoelectronic characteristics of perovskite LEDs", J. Mater. Chem. C 2021, 9, 12661–12670, website
Maria Isabel Pintor Monroy, Iakov Goldberg, Karim Elkhouly, Epimitheas Georgitzikis, Lotte Clinckemalie, Guillaume Croes, Nirav Annavarapu, Weiming Qiu, Elke Debroye, Yinghuan Kuang, Maarten B. J. Roeffaers, Johan Hofkens, Robert Gehlhaar and Jan Genoe, "All-Evaporated, All-Inorganic CsPbI3 Perovskite-Based Devices for Broad-Band Photodetector and Solar Cell Applications", ACS Appl. Electron. Mater. 2021, 3, 7, 3023–3033, website
Yiyue Zhang, Masoumeh Keshavarz, Elke Debroye, Eduard Fron, Miriam Candelaria Rodríguez González, Denys Naumenko, Heinz Amenitsch, Joris Van de Vondel, Steven De Feyter, Paul Heremans, Maarten B. J. Roeffaers, Weiming Qiu, Bapi Pradhan and Johan Hofkens, "Two-dimensional perovskites with alternating cations in the interlayer space for stable light emitting diodes", Nanophotonics 2021,website, pdf (preprint)
Karim Elkhouly, Iakov Goldberg, Hans-Gerd Boyen, Alexis Franquet, Valentina Spampinato, Tung-Huei Ke, Robert Gehlhaar, Jan Genoe, Johan Hofkens, Paul Heremans, and Weiming Qiu, "Operationally Stable Perovskite Light Emitting Diodes with High Radiance", Adv. Optical Mater. 2021, 2100586, website, pdf
Andrei Stankevych, Alexander Vakhnin, Denis Andrienko, Leanne Paterson, Jan Genoe, Ivan Fishchuk, Heinz Bässler, Anna Köhler, and Andrey Kadashchuk, "Density of States of OLED Host Materials from Thermally Stimulated Luminescence", Phys. Rev. Applied 2021, 15, 044050, website, pdf
R. Saxena, V. R. Nikitenko, I. I. Fishchuk, Ya. V. Burdakov, Yu. V. Metel, J. Genoe, H. Bässler, A. Köhler, and A. Kadashchuk. "Role of the reorganization energy for charge transport in disordered organic semiconductors", Phys. Rev. B 2021, 103, 165202, website, pdf
Azhar Fakharuddin, Marius Franckevičius, Andrius Devižis, Andrius Gelžinis, Jevgenij Chmeliov, Paul Heremans, Vidmantas Gulbinas. "Double Charge Transfer Dominates in Carrier Localization in Low Bandgap Sites of Heterogeneous Lead Halide Perovskites", Adv. Funct. Mat. 2021, 2010076, website, pdf
2020
Karim Elkhouly, Robert Gehlhaar, Jan Genoe, Paul Heremans, and Weiming Qiu. "Perovskite Light Emitting Diode Characteristics: The Effects of Electroluminescence Transient and Hysteresis". Adv. Optical Mater. 2020, 8, 2000941. website
2019
Azhar Fakharuddin, Weiming Qiu, Guillaume Croes, Andrius Devižis, Rokas Gegevičius, Alexander Vakhnin, Cedric Rolin, Jan Genoe, Robert Gehlhaar, Andrey Kadashchuk, Vidmantas Gulbinas, Paul Heremans. "Reduced Efficiency Roll-Off and Improved Stability of Mixed 2D/3D Perovskite Light Emitting Diodes by Balancing Charge Injection". Adv. Funct. Mater. 2019, 29, 1904101. website
Azhar Fakharuddin, Umair Shabbir, Weiming Qiu, Tahir Iqbal, Muhammad Sultan, Paul Heremans, and Lukas Schmidt-Mende." Inorganic and Layered Perovskites for Optoelectronic Devices ". Adv. Mater. 2019, 31, 1807095. website
Weiming Qiu, Zhengguo Xiao, Kwangdong Roh, Nakita K. Noel, Andrew Shapiro, Paul Heremans, and Barry P. Rand. " Mixed Lead–Tin Halide Perovskites for Efficient and Wavelength-Tunable Near-Infrared Light-Emitting Diodes". Adv. Mater. 2019, 31, 1806105. website
Jielin Yan, Guillaume Croes, Azhar Fakharuddin, Wenya Song, Paul Heremans, Hongzheng Chen, and Weiming Qiu. " Exploiting Two-Step Processed Mixed 2D/3D Perovskites for Bright Green Light Emitting Diodes". Adv. Optical Mater. 2019, 7, 1900465. website
Conferences
2023
Nirav Annavarapu, Iakov Goldberg, Karim Elkhouly, Jan Genoe, Robert Gehlhaar, Paul Heremans. "Distributed feedback cavity optimization of thin film lasers using deep-UV lithography defined high-quality gratings", SPIE Organic Photonics + Electronics, website
2021
Paul Heremans, Iakov Goldberg, Karim Elkhouly, Weiming Qiu, Nirav Annavarapu, Robert Gehlhaar, Cedric Rolin, Tung-Huei Ke, Jan Genoe, "Perovskite Light Emitting Diodes with Good Quantum Efficiency at Current Densities of kA/cm2", IMID 2021
Karim Elkhouly, Jevgenij Chmeliov, Rokas Gegevičius, Iakov Goldberg, Vidmantas Gulbinas, Robert Gehlhaar, Jan Genoe, Johan Hofkens, Paul Heremans, Weiming Qiu, "Ion Migration Determines the Performance Dynamics of Perovskite LEDs", Nanoge Fall Meeting 2021
Iakov Goldberg, Karim Elkhouly, Weiming Qiu, Nirav Annavarapu, Robert Gehlhaar, Cedric Rolin, Tung-Huei Ke, Jan Genoe, and Paul Heremans "Record operational stability and lasing-level current densities enabled by incremental PeLED downscaling", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 1180810 (1 August 2021); website
2020
Weiming Qiu, Karim Elkhouly, Jan Genoe, and Paul Heremans "Mitigating the detrimental effects of joule heating for perovskite light emitting diodes", Proc. SPIE 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV, 1147316 (20 August 2020); website
Karim Elkhouly, Iakov Goldberg, Nirav Annavarapu, Robert , Weiming "Operationally Stable Perovskite Light-Emitting Diodes with High Radiance", MRS Virtual Fall Meeting 2020
Karim Elkhouly, Robert , Weiming "Perovskite Light Emitting Diode Characteristics—The Effects of Electroluminescence Transient and Hysteresis", MRS Virtual Fall Meeting 2020