[18p-P09-1~54] 12.5 Organic and hybrid solar cells

English Presentation

[18p-P09-9] Photovoltage Mapping of Polymer-Fullerene Solar Cells by Photo-Illuminated Kelvin Probe Force Microscopy

〇(D)CHITLADA MANILATA¹, RYOTA HASEGAWA¹, MASAKAZU NAKAMURA¹, HIROAKI BENTEN¹ (1.NAIST)

Keywords:

Organic solar cells,Photovoltage,Kelvin probe force microscopy (KPFM)

Kelvin probe force microscopy (KPFM) evaluates the surface potential of the active layer of organic solar cells by measuring the contact potential difference (CPD) between the sample surface and AFM probe. However, the correlation between the observed CPD and open-circuit voltage (V_OC) of the device has not been well established. In this study, the photovoltage is evaluated by the CPD shift under the illumination from the dark condition (ΔCPD). Eventually, the spatial distribution of ΔCPD and its correspondence to the device V_OC were discussed.