Optical properties and cooling technologies in crystalline materials

Methylammonium lead iodide (CH3NH3PbI3) based solar cells have shown impressive power conversion efficiencies of above 20%. However, the microscopic mechanism of the high photovoltaic performance is yet to be fully understood. Particularly, the dynamics of CH3NH3(+) cations and their impact on relevant processes such…

• BAHAR İPEK TORUN

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• İBRAHİM KÜRŞAT ŞENDUR
• MUSTAFA PINAR MENGÜÇ

Complex multinary compounds (ternary, quaternary, and higher) offer countless opportunities for discovering new semiconductors for applications such as photovoltaics and thermoelectrics. However, controlling doping has been a major challenge in complex semiconductors as there are many possibilities for charged intrins…

Facile solution processing lead halide perovskite nanocrystals (LHP-NCs) exhibit superior properties in light generation, including a wide color gamut, a high flexibility for tuning emissive wavelengths, a great defect tolerance and resulting high quantum yield; and intriguing electric feature of ambipolar transport w…

• HİLMİ VOLKAN DEMİR

Abstract CsPbBr3 nanocrystals passivated with short molecular ligands and deposited on a substrate were annealed from room temperature to 400 °C in inert atmosphere. Chemical, structural, and morphological transformations were monitored in situ and ex situ by different techniques, while optoelectronic properties of th…

The PHENIX experiment at the BNL Relativistic Heavy Ion Collider has measured second- and third-order Fourier coefficients of the azimuthal distributions of direct photons emitted at midrapidity in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV for various collision centralities. Combining two…

• SERPİL YALÇIN KUZU

Using an effective mass model, the changing valence band character of CaZn 2 Sb 2 –CaMg 2 Sb 2 solid solution was probed along with the thermoelectric properties.

Black α-CsPbI 3 perovskites are unable to maintain their phase stability under room conditions; hence, the α-CsPbI 3 phase transforms into a thermodynamically stable yellow δ-CsPbI 3 phase within a few days, which has a nonperovskite structure and high band gap for optoelectronic applications. This phase transformatio…

• HASAN ŞAHİN
• MUSTAFA MUAMMER DEMİR

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• GÖNÜL ERYÜREK

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• EMRE BAHADIR AL

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• FATİH UNGAN