The 80th JSAP Autumn Meeting 2019

Presentation information

Oral presentation

12 Organic Molecules and Bioelectronics » 12.5 Organic solar cells

[18a-E101-1~12] 12.5 Organic solar cells

Wed. Sep 18, 2019 9:00 AM - 12:15 PM E101 (E101)

Qing Shen(UEC), Tetsuhiko Miyadera(AIST)

9:00 AM - 9:15 AM

[18a-E101-1] Observation of quantized electronic states in 10 nm gold nanoparticles

Bochao Li1, Hao Li1, Chang Yang1, Boyu Ji1, JIngquan Lin1, 〇Toshihisa Tomie1,2 (1.CUST, 2.AIST)

Keywords:quantized electronic states, hot electron, gold nanoparticles

Chemical reactions including solar cells are controlled by transfer of “hot electrons”. It is well known that nanoparticles (NPs) have high chemical activities, however, all previous models assumed the Fermi level as the ground state as shown in Fig.1. Because hot electrons should quickly decay to the ground in this model, transfer efficiency should be very low. We propose that the essential property of NPs is in discrete states which reduce the activation energy DE for transfer of hot electrons as shown in Fig.1. We disclosed a novel diagnostic of excited states in NPs1) and reported an excited state in Au NPs2). This paper reports the observation of quantized discrete electronic states in 10 nm diameter Au NPs.