[19a-P5-1~38] 12.5 Organic solar cells

[19a-P5-36] Enhancement of Photoluminescence Efficiency and Change in Photoexcited Carrier Dynamics in PbS QDs using CdCl₂ Surface Passivation

〇(B)Naoki Nakazawa¹, Takuya Izuishi¹, Keita Ono¹, Syuusuke Kobayashi¹, Yaohong Zhang¹, Chao Ding¹, Taro Toyoda^3,1, Shuzi Hayase^2,3, Qing Shen^1,3 (1.Univ. Electro-commun, 2.Kyushu Inst. Tech, 3.JST CREST)

Keywords:PbS quantum dots,surface passivation

PbS quantum dots (QDS) are attractive materials for optical devices due to their low cost solution processing , high absorption coefficient, their band gap tenability via the quantum size effect. but surface defects affect each optical device because Specific surface area of QDs are very large. This study, we investigated that light absorption , photoluminescence characteristic, relaxational charge dynamics and surface defects of PbS QDS with CdCl2 surface passivation .