Highly efficient organic solar cells enabled by suppressing triplet ...
4 days ago · The high non-radiative energy loss is a bottleneck issue that impedes the improvement of organic solar cells. The formation of triplet exciton is thought to be the main source of the large non ...
The role of exciton lifetime for charge generation in organic solar ...
Aug 31, 2020 · Classen et al. show that long exciton lifetimes enable efficient exciton splitting and thus generation of free charges while also suppressing voltage losses.
Role of Exciton Diffusion and Lifetime in Organic Solar Cells with …
May 12, 2022 · Our analysis suggests that future materials developed for low-offset organic bulk heterojunction solar cells must exhibit high diffusion lengths to support efficient exciton dissociation and that these diffusion lengths must include long exciton lifetimes to support efficient CT state dissociation.
Direct measurement of the exciton binding energy and effective …
Jun 15, 2015 · We demonstrate that by using very high magnetic fields it is possible to make an accurate and direct spectroscopic measurement of the exciton binding energy, which we find to be only 16 meV at...
Enhancing Exciton Diffusion Length Provides New Opportunities …
Aug 5, 2020 · In particular, enhanced exciton diffusion can improve light harvesting in solar cells that can be manufactured using water-based solutions of electron donor and acceptor nanoparticles or by sequential deposition of donor and acceptor, offering low-cost and environmentally friendly production. Summary.
Steric hindrance induced low exciton binding energy enables …
The conspicuously reduced Eb obtained in Y-ChC5 with pinpoint steric hindrance modulation can minimize the detrimental effects on exciton dissociation in low-driving-force OSCs, achieving a remarkable PCE of 19.1% with over 95% internal quantum efficiency.
Exciton diffusion and dissociation in organic and quantum‐dot solar ...
Jan 27, 2023 · For the process of photovoltaic conversion in organic solar cells (OSCs) and quantum-dot solar cells (QDSCs), three of four steps are determined by exciton behavior, namely, exciton generation, exciton diffusion, and exciton dissociation.
Single photovoltaic material solar cells with enhanced exciton ...
Jun 15, 2022 · Typical organic photovoltaic semiconductors exhibit high exciton binding energy (E b, typically >300 meV), hindering the development of organic solar cells based on a single photovoltaic material (SPM-OSCs).
Understanding and Improving Triplet Exciton Transfer in …
Oct 8, 2024 · The triplet exciton transfer from tetracene to silicon has recently found interest in the context of efficiently harvesting high-energy photons with sensitized silicon solar cells. Density-functional calculations presented here show that at covalently bonded, atomically perfect interfaces, no exciton transfer can be expected. The situation changes, however, as soon as realistic interface ...
Decreasing exciton dissociation rates for reduced voltage losses in ...
Mar 27, 2024 · The device’s electroluminescence efficiency is vital to reduce non-radiative voltage losses and boost organic solar cell performance. Here, the authors demonstrate that this efficiency is ...