All-Inorganic Light-Emitting Diodes Based on Solution-Processed Nontoxic and Earth-Abundant Nanocrystals

作者：Bhaumik Saikat^*; Pal Amlan J

来源：IEEE Journal of Quantum Electronics, 2013, 49(3): 325-330.

DOI：10.1109/JQE.2013.2245404

• All-inorganic light-emitting diodes
• d-states of Mn-ions
• Mn-doped ZnS nanoparticles
• NiO
• ZnO nanoparticles

We fabricate and characterize light-emitting diodes (LEDs) based on thin-films of NiO, Mn-doped ZnS, and n-ZnO nanoparticles acting as hole-transporting, emitting, and electron-transporting layers, respectively. We vary the thickness of the individual layers and record current-voltage and luminance-current characteristics. By examining the fitting of the current-voltage characteristics of these all-inorganic LEDs, we find that the hole-and electron-transporting layers lower barrier heights for hole-and electron-injection from the respective electrodes that correspondingly improve electro-luminescence (EL) output. The photoluminescence emission of Mn-doped ZnS nanoparticles and EL emission of the LEDs resembled implying that excitons formed in the doped nanostructures followed by a radiative transition between d-states of Mn-ions.

• 出版日期2013-3