| abstract |
A perovskite nano-crystal thin film comprises a plurality of perovskite nano-crystals which are bonded to each other through ligands to thereby be arranged two-dimensionally or three-dimensionally, wherein each of the perovskite nano-crystals is represented by the chemical formula: ABX 3 (wherein A = CH 3 NH 3 , Cs or CH(NH 2 ) 2 ; B = Pb, Cd, Sb, Bi or Sn; X = Cl, Br or I). The ligands are oleic acid and Y-(CH 2 ) n -NH 2 (Y = H or NH 2 ; n = 6, 8 to 16, 18, 20, 21 or 34). The perovskite nano-crystal thin film is formed by attaching a solution prepared by dispersing the perovskite nano-crystals having the ligands attached thereto in a solvent onto a substrate and then drying the solution, thereby self-assembling the perovskite nano-crystals having the ligands attached thereto. |