Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Optical Simulation Study on Indoor Organic Photovoltaics with Textured Electrodes towards Self-powered Photodetector

  • Biswas, Swarup (Department of Electrical Engineering, RIGET (Research Institute of Green Energy Technology), Gyeongsang National University) ;
  • Kim, Hyeok (Department of Electrical Engineering, RIGET (Research Institute of Green Energy Technology), Gyeongsang National University)
  • Received : 2019.07.22
  • Accepted : 2019.07.30
  • Published : 2019.07.31
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Abstract

In this work, we performed an optical simulation study on the performance of a PMDPP3T:PCBM based on an organic photovoltaic (PV) device. The virtual PV device was developed in Lumerical, finite-difference time-domain (FDTD) solutions. Different layers of the PV cell have been defined through the incorporation of complex refractive index value of those layers' constituent materials. During the simulation study, the effect of the variation active layer thickness on an ideal short circuit current density ($J_{sc,ideal}$) of the PV cell has been, first, observed. Thereafter, we have investigated the impact of surface roughness of a transparent conducting oxide (TCO) electrode on $J_{sc,ideal}$ of the PV cells. From this simulation, it has been observed that the $J_{sc,ideal}$ value of the PV cell is strongly dependent on the thickness of its active layer and the photon absorption of the PV cell has gradually decreased with the increment of the TCO's surface roughness. As a result, the capability of the PV device has been reduced with the increment of the surface roughness of the TCO.

Keywords

HSSHBT_2019_v28n4_236_f0001.png 이미지

Fig. 1. Schematic diagram of the PV cell constructed for the simulation study.

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Fig. 2. Variation of simulated Jsc,ideal value of the PV device, with active layer thickness and TCO electrode surface roughness, operated under the illumination of 1000 Lux white LED

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Fig. 3. Variation of simulated Jsc,ideal value of PV device with the surface roughness of the TCO electrode.

HSSHBT_2019_v28n4_236_f0004.png 이미지

Fig. 4. Variation of simulated absorption ability of the active layer, with the surface roughness of the TCO electrode.

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