Kim, Jungdong Kim, Seung Gi Oh, Eunsoon Kim, Sang Hyuk Choi, Won Jun 2024-01-20T05:03:07Z 2024-01-20T05:03:07Z 2021-09-05 2016-01-29 0957-4484 https://pubs.kist.re.kr/handle/201004/124490 We studied temperature dependent photoluminescence (PL) spectra in the mid-infrared range from lead sulfide (PbS) nanosheets with an average thickness of 25 nm and nanocubes grown by solvothermal and hydrothermal methods. Distinct bandedge PL emission was observed in the whole temperature range between 10 and 300 K, indicating the high optical quality of these nanostructures. The PL peak of the nanosheets was found at 0.326 eV at 10 K, about 40 meV higher than that of bulk PbS due to the quantum confinement effect, whereas no confinement effect was observed for the nanocubes. We also demonstrate that the absorption edges of the nanocubes and nanosheets in the transmission spectra agree very well with their fundamental bandgap. English IOP PUBLISHING LTD PBS GROWTH Temperature dependent photoluminescence from lead sulfide nanosheets and nanocubes Article 10.1088/0957-4484/27/4/045707 1 NANOTECHNOLOGY, v.27, no.4 NANOTECHNOLOGY 27 4 scie scopus 000366825000019 2-s2.0-84950118319 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article PBS GROWTH lead sulfide photoluminescence nanosheets