Upconversion nanoparticles extending the spectral sensitivity of silicon photodetectors to λ = 1.5 μ m

Hengyang Xiang , Lei Zhou , Hung-Ju Lin , Zhelu Hu , Ni Zhao , Zhuoying Chen (1)

1 LPEM - Laboratoire de Physique et d'Etude des Matériaux (UMR 8213)

The telecommunication wavelength of = 1.5 µm has been playing an important role in various fields. In particular, performing photodetection at this wavelength is challenging, demanding more performance stability and lower manufacturing cost. In this work, by integrating solution-processed Er 3+ doped NaYF4 upconversion nanoparticles (UCNPs) onto a silicon photodetector, UCNPs/Si hybrid photodetectors (hybrid PDs) are presented. Upon optimization, we demonstrated that a layer of UCNPs can well lead to an effective spectral sensitivity extension without scarification of the photodetection performance of the Si photodetector in the visible and near-infrared (near-IR) spectrum. Under the = 1.5 µm illumination, the hybrid UCNPs/Si-PD exhibits a room-temperature detectivity of 6.15 × 10 12 Jones and a response speed of 0.4 ms. These UCNPs/Si-PDs represent a promising hybrid strategy towards the quest of low-cost and broad-band photodetection sensitive from the visible down to the shortwave infrared spectrum.

Mots clés: photodetectors; upconversion nanoparticles; short-wave infrared; solution-process

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Hengyang Xiang, Lei Zhou, Hung-Ju Lin, Zhelu Hu, Ni Zhao, et al.. Upconversion nanoparticles extending the spectral sensitivity of silicon photodetectors to λ = 1.5 μ m. Nanotechnology, 2020, 31 (49), pp.495201. ⟨10.1088/1361-6528/abb2c4⟩. ⟨hal-02989880⟩