@article{gadikar_yang_pei_yi_kotyrov_gundogdu_you_so_2026, title={Mitigating Illumination Sensitive Dark Current in Inverted Organic Photodiodes by ZnO Defect Passivation}, volume={1}, DOI={10.1021/acsami.5c22817}, abstractNote={Organic photodiodes (OPDs) are a compelling alternative to their inorganic counterparts due to their tunable spectral response and compatibility with solution-processable fabrication. However, the performance of high-performance inverted OPDs incorporating a zinc oxide (ZnO) electron transport layer (ETL) is significantly hampered by the light-soaking effect. This phenomenon, triggered by exposure to light (particularly ultraviolet light), causes a pronounced and reversible increase in dark current, leading to instability in the signal-to-noise ratio and compromising device reliability. To address this fundamental issue, we introduce a targeted interfacial passivation strategy by depositing a thin conjugated polyelectrolyte interlayer, PNDIT-F3N-Br, at the ZnO/bulk heterojunction (BHJ) interface. Comprehensive characterization, including X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and trap density analysis, reveals the suppression of oxygen adsorption, resulting in an increase in shunt resistance, and a reduction in trap density. Finally, OPDs with the modified ETL exhibit significantly enhanced photostability, with minimal variation in dark current upon illumination. This work provides a critical insight into overcoming a key limitation of ZnO-based optoelectronics, paving the way for the development of stable and high-performance OPDs.}, journal={ACS Applied Materials & Interfaces}, author={Gadikar, Apurva and Yang, Yi and Pei, Yusen and Yi, Jingwei and Kotyrov, Myratgeldi and Gundogdu, Kenan and You, Wei and So, Franky}, year={2026}, month={Jan} }
 @article{biliroglu_tuere_ghita_kotyrov_qin_seyitliyev_phonthiptokun_abdelsamei_chai_su_et al._2025, title={Unconventional solitonic high-temperature superfluorescence from perovskites}, volume={5}, url={https://doi.org/10.1038/s41586-025-09030-x}, DOI={10.1038/s41586-025-09030-x}, abstractNote={Fast thermal dephasing limits macroscopic quantum phenomena to cryogenic conditions 1-4  and hinders their use at ambient temperatures 5,6 . For electronic excitations in condensed media, dephasing is mediated by thermal lattice motion 1,7,8 . Therefore, taming the lattice influence is essential for creating collective electronic quantum states at high temperatures. Although there are occasional reports of high-T c  quantum effects across different platforms, it is unclear which lattice characteristics and electron-lattice interactions lead to macroscopically coherent electronic states in solids 9 . Here we studied intensity fluctuations in the macroscopic polarization during the emergence of superfluorescence in a lead halide perovskite 10  and showed that spontaneously synchronized polaronic lattice oscillations accompany collective electronic dipole emission. We further developed an effective field model and theoretically confirmed that exciton-lattice interactions lead to a new electronically and structurally entangled coherent extended solitonic state beyond a critical polaron density. The analysis shows a phase transition with two processes happening in tandem: incoherent disordered polaronic lattice deformations establish an order, while macroscopic quantum coherence among excitons simultaneously emerges. Recombination of excitons in this state culminates in superfluorescence at high temperatures. Our study establishes fundamental connections between the transient superfluorescence process observed after the impulsive excitation of perovskites and general equilibrium phase transitions achieved by thermal cooling. By identifying various electron-lattice interactions in the perovskite structure and their respective role in creating collectively coherent electronic effects in solids, our work provides unprecedented insight into the design and development of new materials that exhibit high-temperature macroscopic quantum phenomena.}, journal={Nature}, author={Biliroglu, Melike and Tuere, Mustafa and Ghita, Antonia and Kotyrov, Myratgeldi and Qin and Seyitliyev, Dovletgeldi and Phonthiptokun, Natchanun and Abdelsamei, Malek and Chai, Jingshan and Su, Rui and et al.}, year={2025}, month={May} }