[19p-P04-1~45] 12.5 Organic and hybrid solar cells

[19p-P04-9] Characterization of V_OC in D/A Bilayer Organic Solar Cells by Kelvin Probe Force Microscopy

〇Ryota Hasegawa¹, Chitlada Mani-Lata¹, Yongyoon Cho¹, Manish Pandey¹, Masakazu Nakamura¹, Hiroaki Benten¹ (1.NAIST)

Keywords:

Organic Photovoltaics,Open circuit voltage,KPFM

To improve the performance of organic thin film solar cells, it is necessary to evaluate the V_OC in the local area in correspondence with the blend film structure. Kelvin probe force microscopy (KPFM) measures the contact potential difference (CPD) between the sample and the AFM tip at the nanoscale, and the relationship between the CPD obtained by KPFM measurements and V_OC has not been fully discussed. In this study, we first fabricated a model device using a D/A multilayer with a well-defined structure as a power generating layer, and then performed KPFM measurements under light irradiation to discuss whether quantitative evaluation of V_OC is possible.