[17p-K302-1~8] 13.6 ナノ構造・量子現象・ナノ量子デバイス

15:15 〜 15:30奨励賞エントリー英語発表

[17p-K302-6] Spectral-Dependent Performance of Colloidal PbS Quantum Dot Epitaxially-Connected Superlattice Photodetectors

〇(D)Dadan Suhendar¹, Ricky Dwi Septianto^2,1, Satria Zulkarnaen Bisri^1,2 (1.Tokyo Univ. Agri. & Tech, 2.RIKEN CEMS)

キーワード：

Colloidal Quantum Dot、QD Superlattice、Photodetectors

Colloidal quantum dots (CQDs) are a promising advancement for photodetectors, as they can absorb a broad range of photon energies and reduce energy losses from phonon generation. However, challenges such as low charge carrier mobility and air stability hinder their use in high-performing devices. Our recent work shows that epitaxially-connected QD superlattices can achieve high electron mobility. In this study, we present the tunable responsivity of epitaxially connected QD superlattice (QDSL) photodetectors under various wavelengths and demonstrate air-stable operation. We observe heightened responsivity at shorter wavelengths due to increased photocarrier generation. This may indicate the possibility of the presence of MEG phenomena in the QD superlattice.