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- W3048263140 abstract "Electron/hole transporting interlayer films are vital to photovoltaic devices for enhancing both efficiency and stability. The acidic nature of the standard anode buffer layer (or hole transport layer; HTL) PEDOT:PSS limits the stability of inverted polymer solar cells (IPSCs). High-quality inorganic substitutes for PEDOT:PSS usually needs vacuum deposition and therefore are not preferred choice for the large-scale and low-cost production of IPSCs. Here, we fabricated highly efficient and stable IPSCs with solution-processed tungsten oxide (WO 3 ) anode buffer layer as an alternative. The effect of acidity over device stability was compared with WO 3 nanostructures in different solvents. We fabricated IPSCs without encapsulation using both standard P3HT:PC 61 BM and low-bandgap polymer PTB7:PC 71 BM bulk heterojunction (BHJ) with acidic (WO 3 nanoparticle; WNP) and neutral (WO 3 nanosheets; WNS) anodic buffer layers. Cells fabricated with WNS layer exhibit ~11% (η = 5.1%) and ~15% (η = 7.8%) enhancements in the PCE for P3HT:PC 61 BM and PTB7:PC 71 BM bulk heterojunction (BHJ) respectively, compared to the standard cells made with PEDOT:PSS. Also, this is the first report where a WNS and P3HT:PC 61 BM blend is used as the anode buffer layer that yields the highest efficiency of ~5.1% with excellent air stability of ~240 h without encapsulation. • Efficiency and operational life of OPVs could be enhanced using WO 3 .nH 2 O HTL. • Better hole collection efficiency/hole mobility could be achieved for sheet-like morphology. • Obtained benchmark efficiency values with 240 h tested shelf life." @default.
- W3048263140 created "2020-08-13" @default.
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- W3048263140 date "2020-11-01" @default.
- W3048263140 modified "2023-09-25" @default.
- W3048263140 title "Studies on solution-processed tungsten oxide nanostructures for efficient hole transport in the inverted polymer solar cells" @default.
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- W3048263140 doi "https://doi.org/10.1016/j.matchemphys.2020.123584" @default.
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