TY - JOUR N2 - Transparent Al doped ZnO nanocrystalline films with a crystallite size less than 19 nm are obtained by spray pyrolysis. Band gap increases monotonically from 3.16 to 3.31 eV with increasing aluminum dopant up to 1.56 at.% facilitating increasing width of a transmission window in addition to the band gap tuning of 4.74% which compares favorably well with literature. UV emission with continuously increasing intensity is obtained which reflects on the good crystalline quality of the films. Also the defect emissions are suppressed remarkably as the dopant Al concentration increases in ZnO. The band gap tuning by quite small increment in dopant amount makes the present films, much attractive for the fabrication of light emitting devices with a much sought-for benefit of large area fabrication. FESEM shows the surface is granular with grain size lying in the range of 20–35 nm and EDX confirms the presence of Al in the doped samples. L1 - http://journals.pan.pl/Content/115283/PDF/main.pdf L2 - http://journals.pan.pl/Content/115283 PY - 2018 IS - No 1 EP - 10 KW - Al doped ZnO KW - Spray pyrolysis KW - Band-gap KW - Enhanced UV-emission KW - Suppression of defect-emission A1 - Kumar, N. A1 - Srivastava, A. PB - Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology VL - vol. 26 DA - 05.12.2017 T1 - Enhancement in NBE emission and optical band gap by Al doping in nanocrystalline ZnO thin films SP - 1 UR - http://journals.pan.pl/dlibra/publication/edition/115283 T2 - Opto-Electronics Review ER -