[13p-B7-1~12] ナノ界面現象と評価技術の現状と課題

▼ [13p-B7-9] Effect of Metal Nanoparticles on Metallic Grating Electrodes in Organic Thin-Film Solar Cells

Thitirat Putnin^1,2、〇(D)Sopit Phetsang^1,2、Apichat Pangdam¹、Pitchaya Mungkornasawakul²、Kontad Ounnunkad²、Chutiparn Lertvachirapaiboon¹、Kazunari Shinbo¹、Keizo Kato¹、Futao Kaneko¹、Akira Baba¹ (1.Niigata univ. for Niigata University、2.Chiang Mai univ. for Chiang Mai university)

キーワード：organic solar cell

Organic thin-film solar cells are promising technologies for photovoltaic devices. In term of enhanced optical absorption of thin films, plasmonic effects have been recently introduced for increasing light trapping and improving the efficiency of the solar cells. In this work, the propagating surface plasmon resonance (SPR) on grating structures has been studied to enhance the device performances. Moreover, the incorporation of the localized SPR with the propagating SPR with metal nanoparticles has also been investigated for more improvement. The incorporation of gold nanoparticles (AuNPs) or silver (Ag) nanoplates in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) or hole transport layer was performed to fabricate the developing cell. The PDMS pattern from Blu-ray disk recordable (BD-R) was transferred by nanoimprinting technique on the top surface of active layer via thermal imprinting technique. The device consisted of Al/P3HT:PCBM/NPs:PEDOT:PSS/ITO/glass substrate structure as shown in Figure 1. The photovoltaic properties of the fabricated solar cell have been studied. Figure 2 shows the surface morphology of developed solar cell with a pattern from BD-R grating and reference flat cells. The power conversion efficiency (PCE) of solar cells with grating structures and AuNPs or Ag nanoplates provided a better %PCE with 3.15%, 3.36%, and 3.59% respectively. In this case, the synergic effects between the propagating SPR and localized SPR, attributed to a higher efficiency due to the increased absorption property.