Size dependence of upconversion photoluminescence in MPA capped CdTe quantum dots: Existence of upconversion bright point

作者：Ananthakumar S; Jayabalan J^*; Singh Asha; Khan Salahuddin; Babu S Moorthy; Chari Rama

来源：Journal of Luminescence, 2016, 169: 308-312.

DOI：10.1016/j.jlumin.2015.09.019

• Quantum dots
• Photoluminescence
• Two-photon excitation
• Upconversion luminescence

The photoluminescence (PL) from semiconductor quantum dots can show a "PL bright point", that is the PL from as prepared quantum dots is maximum at a particular size. In this work we show that, for CdTe quantum dots, upconversion photoluminescence (UCPL) originating from nonlinear absorption shows a similar "UCPL bright point". The PL and UCPL bright points occur at nearly the same size. The existence of a UCPL bright point has important implications for upconversion microscopy applications.

• 出版日期2016-1