High-efficiency organic solar cells based on a halide salt and polyfluorene polymer with a high alignment-level of the cathode selective contact

Abstract

The combination of halide salts with polyfluorene used as the buffer cathode in organic solar cells greatly improves the photovoltaic performance with the best power conversion efficiency being 11%.

Futuristic electron transport layer based on multifunctional interactions of ZnO/TCNE for stable inverted organic solar cells

“…At the same time, the ETL also modies the interface between the photoactive layer and the electrode, minimizing interface defects, and charge recombination. 6 To realize a perfect ETL for enhancing the performance of OSCs, numerous materials including n-type metal oxide semiconductors such as titanium oxide (TiO x ), 7,8 Zinc Oxide (ZnO), 9 stannic oxide (SnO 2 ), 10 cesium carbonate (Cs 2 CO 3 ), 11,12 and polymers, carbon-based materials, small-molecules, 13,14 hybrids/composites, 15 and other evolving contestants have been grown-up as ETL in inverted BHJ OSCs. [16][17][18] Among them, ZnO is a more attractive material owing to its excellent optical transparency, relatively high electron mobility, environment-friendly nature, and ease of fabrication.…”

Shelf lifetime analysis of organic solar cells combining frequency and time resolved techniques

“…To investigate the effect of different ETLs on charge kinetics and recombination, fresh and degraded nonencapsulated iOSCs were measured under operando conditions by using charge extraction (CE) and transient photovoltage (TPV)/photocurrent (TPC) techniques. These techniques have been frequently employed to analyze the carrier losses and the carrier recombination in dye-sensitized solar cells and OSCs, [49][50][51] and more recently in perovskite solar cells. [52][53][54] Understanding the carrier loss mechanisms is key to increase solar cell efficiency.…”

Significant Stability Improvement of Fullerene Organic Photovoltaics via ZnO Film Modification through the Intermittent Spray Pyrolysis Technique

“… 7 − 11 Regarding the latest mentioned approaches, as shown by Lloyd et al., 12 MacLeod et al, 13 and several other reported studies, the inverted architectures has noticeably improved the OPV device stability over the conventional structures from the scale of minutes up to years. 13 − 15 Therefore, with this context, we fabricated an inverted fullerene OPV (iF-OPV) based on selecting zinc oxide (ZnO) as the electron interfacial transporting material [electron transport layer (ETL)] for reinforcing the electron collection at the transparent conducting electrode and acquiring a high-performance and stable OPV. 13 This selection was mainly regarding its n-type conductivity and high optical transmission at vital wavelengths for solar energy conversion applications.…”