Dramatic improvement of excitonic photoluminescence in metal halide films

Mixtures of quasi-two and three dimensional hybrid organic-inorganic semiconducting perovskites for single layer LED

“…3D material [41]. This is a manifestation of energy transfer and such effects are not unique as in [41], but have been observed in other similar semiconductors such as CsPbBr 3 , for example see references in [42][43][44][45][46][47]. In the latter works it is shown that microcrystalline CsPbBr 3 has stronger PL than in bulk or polycrystalline form.…”

Nanocrystalline/microcrystalline materials based on lead-halide units

“…behave as three-dimensional (3D) semiconducting systems. 4,5,8,13,14,[18][19][20][21][22][23][25][26][27][36][37][38][39][40][41][42] Compounds of the type (SC) nÀ1 (BC) 2 M n X 3n+1 (n ¼ 2: bilayer; n ¼ 3: trilayer; n $ 3: multilayer) behave as quasi-two-dimensional (q-2D) semiconducting systems. [3][4][5][6]13,14,16,24,38 Generally, the q-2D compounds have been prepared from solutions or melts of the corresponding 2D and 3D compounds.…”

Electrically pumped random lasers fabricated from ZnO nanowire arrays

“…This large exciton binding energy ensures low threshold lasers may be realized in ZnO in relatively simple structures. 12,13 Actually, ZnO has been one of the most active materials for the fabrication of random lasers. Another interesting character of ZnO lies in the fact that rich nanostructures can be created from this material using relatively easy approaches, [14][15][16] and the large surface area of these nanostructures is favorable for strong scattering, which is essential for the operation of random lasers.…”