Improvement in the hole collection of polymer solar cells by utilizing gold nanoparticle buffer layer

Improvement of Short‐Circuit Current Density in Dye‐Sensitized Solar Cells Using Sputtered Nanocolumnar TiO2 Compact Layer

“…The increase in the short-circuit current density and the number of electrons that could reach the ITO substrate was attributed to the presence of effectively continuous electron pathways, which reduced the recombination of electrons, between the porous TiO 2 film and the ITO substrate. Furthermore, in this work, the GNPs were doped in porous TiO 2 films, raising the Fermi level [7,8] as a Schottky barrier, and then the exiting electrons flowed spontaneously into the TiO 2 conductive band through the barrier, inhibiting the back-transfer of electrons [19]. Hence, the solar conversion efficiency of DSSCs with a compact layer was higher than that of traditional DSSCs.…”

“…Gold nanoparticles (GNPs) have been used in solar cells because of their particular optical and electrical properties. They reportedly increase the generation of charge carriers, photocurrent, and efficiency of conversion of solar energy in DSSCs [6][7][8]. Several materials have been employed in the compact layer, or blocking layer; they include TiO 2 [9][10][11], Nb 2 O 5 [12], ZnO [13], CaCO 3 [14], and BaCO 3 [15], which reduce the area of contact between the conductive substrate and the redox electrolyte.…”

Study of Ruthenium Complex Sensitizer and Gold Nanoparticles Doped Flexible Organic Solar Cells

“…Therefore, the effective absorption of P3HT:PCBM active layer can be optimized by varying the active layer thickness. Previous studies have applied a traditional ruthenium complex sensitizer cis-bis(thiocyanato) bis(2,2 -bipyridyl-4,4 -dicarboxylate) ruthenium bis(tetrabutylammonium) (N719) in dye-sensitized solar cells to extend the optical threshold wavelength since the N719 sensitizer should absorb photons from the visible to near-infrared (NIR) region of the solar spectrum while maintaining sufficient thermodynamic driving force for the electron injection and dye regeneration process [29][30][31][32]. This work also attempted to increase the efficiency of flexible solar cells by introducing N719 into the P3HT:PCBM active layer.…”

Fabrication and Characterization of Organic Solar Cells with Gold Nanoparticles in PEDOT:PSS Hole Transport Layer

“…, 표면처리기법 16) , 소자구조 변화 2) , 열처리 조건 4,12,[17][18] 등 유기태양전지 제조공정에 대한 연구가 활발히 진행되 고 있으며, 효율 향상을 위한 다각적인 연구들이 진행되 고 있다. 본 논문에서는 캐리어의 이동도(mobility) 및 전도도 (conductivity)를 개선하고 19) , 흡수된 빛의 이동 경로를 증 가시켜 광흡수도(absorption intensity)를 높이기 위하여 정 공 수송층(hole transport layer, HTL) 재료에 금(Au) 나노 입자를 첨가하여 유기태양전지를 제작하였다. 금 나노입 자를 코팅한 ITO투명전극의 효과적인 전하 수집은 금 나 노입자가 가지는 우수한 전도도, 높은 일함수와 매끄러 운 표면 형상 형성에 기인되기 때문이다 19) .…”

“…본 논문에서는 캐리어의 이동도(mobility) 및 전도도 (conductivity)를 개선하고 19) , 흡수된 빛의 이동 경로를 증 가시켜 광흡수도(absorption intensity)를 높이기 위하여 정 공 수송층(hole transport layer, HTL) 재료에 금(Au) 나노 입자를 첨가하여 유기태양전지를 제작하였다. 금 나노입 자를 코팅한 ITO투명전극의 효과적인 전하 수집은 금 나 노입자가 가지는 우수한 전도도, 높은 일함수와 매끄러 운 표면 형상 형성에 기인되기 때문이다 19) . 광활성층으로 는 P3HT와 PCBM의 혼합된 bulk-heterojunction ( [19][20] .…”