The big red shift of photoluminescence of Mn dopants in strained CdS: a case study of Mn-doped MnS-CdS heteronanostructures.
The red photoluminescence of Mn dopants in MnS-CdS heteronanostructures has been observed for the first time. The red photoluminescence at 650 nm derives from emission due to the (4)T(1) --> (6)A(1) transition of Mn(2+) dopants in a CdS matrix exposed to gigapascal-level lattice stress. HRTEM, FFT, XRD, and optical studies revealed that the lattice of Mn-doped CdS is compressed to match that of MnS when CdS crystallizes at the MnS surface to form MnS-CdS heteronanostructures. The photoluminescence decay times of such Mn dopants are on the order of nanoseconds because of the spin-flip interactions between Mn dopants and free carriers in the CdS matrix.
Zuo
Taisen
T
Lab for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR. China.
Sun
Zhipeng
Z
Zhao
Yuliang
Y
Jiang
Xiaoming
X
Gao
Xueyun
X
D019187:Cadmium Compounds / Q000737:chemistry*; D003116:Color; D008163:Luminescent Measurements; D008274:Magnesium / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction
D019187:Cadmium Compounds; D017895:Manganese Compounds; D013440:Sulfides; C034939:cadmium sulfide; C041368:manganese sulfide; D008274:Magnesium