Understanding and resolving the mechanisms that affect the photoluminescence (PL) of Si QDs are of great importance because of their strong potential for optoelectronic and solar cell materials. In this article, the intrinsic exciton dynamics of water-dispersed allylamine-functionalized silicon quantum dots (Si QDs) have been explored as a function of temperature by means of steady-state and ti...

PPY, PANI and PPY-PANI-ZnO ternary nanocomposites were synthesized in the laboratory via chemical oxidative polymerization method. The formation of corresponding change nanostructure with incorporation ZnO was examined by X-ray diffraction technique (XRD). Nano-flakes like structure formed PPY-PANI polymeric matrix embodiment nanoparticles, as surface topology images. Optical transmittance spec...

Mid-wavelength infrared (MWIR) photodetectors (PDs) are highly essential for environmental sensing of hazardous gases, security, defense, and medical applications. Mercury cadmium telluride (MCT) materials have been the most used detector in MWIR range. However, it is plagued by several challenges including toxicity concerns, a high rate Auger nonradiative recombination, large band-to-band (BTB...

Abstract Semiconducting iron disilicide ( β -FeSi 2 ) films were epitaxially grown on the Ag-layer pre-coated Si(111) substrates with an initial layer by metal–organic chemical vapor deposition method. These had (101)-preferred orientations, and their crystal quality was improved as growth temperature increased from 893 to 1093 K. The photoluminescence (PL) intensity of (101)-oriented at 973 K ...

The precise quantification of the impact photoluminescence reabsorption (PLr) in metal-halide perovskite solar cells (PSCs) remains challenging. Herein, PLr effect is examined by combined time-resolved (TRPL) spectroscopy and terahertz (TRTS) a model proposed that relates both, nonradiative recombination rate (knr) to quasi-Fermi-level splitting (QFLS). shown be beneficial for QFLS when below c...

The origins of many unique properties halide perovskite semiconductors can be traced to charge–lattice interactions that lead large polaron formation combined with their unusual electronic structure defects. However, the ability understand and control interplay these states dynamic disorder arising from structural fluctuations metal framework is needed guide continued development new variants m...

The open-circuit voltage (VOC) is the main limitation to higher efficiencies of Cu(In,Ga)Se2 solar cells. One most critical parameters directly affecting VOC charge carrier lifetime. Therefore, it essential evaluate extent which inhomogeneities in material properties limit lifetime and how postdeposition treatments (PDTs) growth conditions affect properties. Time-resolved photoluminescence (TRP...