Emrullah Görkem Günbaş

E-mail

ggunbas@metu.edu.tr

Department

Department of Chemistry

ORCID

0000-0003-2279-3032

Scopus Author ID

57194534895

Web of Science Researcher ID

I-8975-2016

A Hydroxy-Substituted Trialkyloxonium Ion and Its Oxonium Alkoxide Zwitterion Otsuki, Andrew L.; Alkan, Gizem Atakan; Manabe, Shuhei; Shewa, Wondimagegn T.; Günbaş, Emrullah Görkem; Fettinger, James C.; Mascal, Mark; Hafezi, Nema (2026-05-11) Trialkyl oxonium salts are among the most powerful electrophiles known. They are immediately quenched by nucleophiles like alcohols and halide ions, and are therefore used in unreactive solvents and have non-nucleophilic c...
Activatable Silicon-Xanthene Photosensitizer for Photodynamic Therapy of Glioblastoma Karaman, Osman; Kepil, Dilay; FOROUGH, MEHRDAD; Elmazoglu, Zubeyir; Günbaş, Emrullah Görkem (2026-04-01) Background: Photodynamic therapy (PDT) offers a promising complementary strategy for treating glioblastoma multiforme (GBM); however, limited control over photosensitizer activation and reduced efficacy under hypoxic condi...
Battery-Free Near Field Communication (NFC)-Assisted Advanced Ethanol Sensing Platform Based on Conjugated Polymer Nanoparticles OSMANOĞULLARI, SILA CAN; Soyler, Dilek; Varlioglu Yaylali, Figen; Karabag, Aliekber; Yeniterzi, Dilara; Timur, Suna; Günbaş, Emrullah Görkem; Soylemez, Saniye (2026-01-23) The incorporation of biorecognition elements with electronic components into point-of-care testing (POCT) devices expands their capabilities and enables intricate quantitative assays. The combination of near field communic...
Room-temperature electron-selective passivating contact with titanium–peroxo complexes for high-efficiency silicon solar cells Beyraghi, Naser; Bektaş, Gence; Donmez, Doguscan; Dehnavi, Mohammad; Chen, Daming; Chen, Yifeng; Feng, Zhiqiang; Shen, Hui; Günbaş, Emrullah Görkem; Yerci, Selçuk (2026-01-01) The increasing demand for high-performance and cost-effective solar cells is a driving factor in the development of new nanomaterials or compounds compatible with low-cost, low-temperature fabrication routes. Titanium oxid...
Drastic Impact of Donor Substituents on Xanthenes in the PDT of Glioblastoma Karaman, Osman; Yesilcimen, E.; Forough, M.; Elmazoglu, Z.; Günbaş, Emrullah Görkem (2025-10-01) Even though significant progress has been made in treating various cancer types, brain cancers lag drastically. Several factors contribute, led by operational difficulties, the blood-brain barrier, and the tendency of recu...
Functionalized Phenyl Methanaminium Salts Provide Highly Stable Perovskite Solar Cells Yaşa, Mustafa; Celik, Esra Bag; Gao, Xiao-Xin; Karabağ, Zeynep Gözükara; Gunes, Ummugulsum; Syzgantseva, Olga A.; Syzgantseva, Maria A.; Zhong, Liping; Züttel, Andreas; Dyson, Paul J.; Nazeeruddin, Mohammad Khaja; Toppare, Levent Kamil; Yerci, Selçuk; Günbaş, Emrullah Görkem (2025-03-01) One of the leading approaches to enhancing the performance and stability of perovskite solar cells (PSCs) involves passivating the perovskite surface and grain boundaries with large ammonium salts. Here, we report the synt...
Self-Assembled Superacid Monolayers on c-Si Provide Exceptional Surface Passivation and Low Contact Resistivity Ghasemi, Milad; Maden, Cem; Bektaş, Gence; Tsoi, Konstantin; Günbaş, Emrullah Görkem; Toffoli, Hande; Yerci, Selçuk (2025-01-01) Minimizing surface recombination is crucial for enhancing silicon solar cell passivation. Conventional dielectric materials require vacuum deposition and high-temperature annealing, increasing complexity and cost. This stu...
NIR-ACTIVATED SILICON-RHODAMINE BASED PHOTOSENSITIZER AS A PROMISING THERAPEUTIC AGENT AGAINST GLIOBLASTOMA Özoğul, Naz; Karaman, Osman; Elmazoğlu, Zübeyir; Günbaş, Emrullah Görkem (2024-11-01) Objectives: Glioblastoma multiforme (GBM) remainsone of the most aggressive malignant tumors inthe central nervous system with low survival rate. Insufficientstandard care of the disease provoked needfor an alternative tre...
Photodynamic Therapy against Glioblastoma: Investigating phenoselenazine based photosensitizer as a promising therapeutic agent Yeşilçimen, Elif; Karaman, Osman; Elmazoğlu, Zübeyir; Günbaş, Emrullah Görkem (2024-11-01) Objectives: Glioblastoma Multiforme (GBM) is themost aggressive malignant brain tumor. Photodynamictherapy (PDT) is a promising treatment strategyagainst GBM. It exerts cytotoxic effect by producingROS, mainly singlet oxyg...
Wide Bandgap Perovskite Solar Module Geometry Optimization by Single-diode Modeling Leading >98% Geometrical Fill Factor >80% Fill Factor Uzuner, Bahri Eren; Zarean Afshord, Amir; Aguirre, Aranzazu; Aernouts, Tom; Günbaş, Emrullah Görkem; Kuang, Yinghuan; Yerci, Selçuk (2024-07-05)

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