Solid additive for organic polymer solar cell

Abstract

The invention relates to a solid additive for an organic polymer solar cell, which is characterized in that the solid additive is an aromatic substance containing a carbonyl, a carboxyl, an aldehyde group or an ester group, and the molecular weight of the solid additive is 100-500g / mol. The invention further relates to an organic polymer solar cell device. The organic polymer solar cell device ischaracterized by sequentially comprising a transparent electrode, an electron transport / hole barrier layer, an active layer, an electron barrier / hole transport layer and a metal electrode, wherein theactive layer comprises a wide band gap conjugated polymer electron donor, a non-fullerene small molecule electron acceptor and the solid additive. The solid additive disclosed by the invention can prolong the service life of receptor excitons, so that the excitons can be effectively migrated to an electron donor-receptor interface, the exciton separation efficiency is improved, and the short-circuit current density, the filling factor and the photoelectric conversion efficiency of a solar cell device are further improved.

Description

technical field [0001] The invention belongs to the field of organic semiconductor devices, and relates to a solid additive that can be used to improve the performance of organic polymer solar cells, and the additive is applied to the active layer part in the structure of the battery device. Background technique [0002] With the rapid development of the times, the problem of energy shortage and pollution is becoming more and more serious. In order to solve this problem, it has become the focus of social attention to find a new type of energy with abundant reserves, clean and pollution-free. Solar energy, at 1366W / m per second 2 The ultra-high energy density radiates in the atmosphere. Although it can cause losses through absorption and reflection, it still has 1000W / m in the 280nm-4000nm band. 2 Therefore, the development and utilization of this "inexhaustible" energy has become an important way to solve energy problems. The development of solar cells is the most direct a...

AI Technical Summary

Problems solved by technology

However, this type of liquid additive is difficult to remove due to its high boiling point, which brings difficulties to the large-area fabrication of devices

At the same time, such additives used to adjust the morphology of the active layer only have a more obvious improvement effect on the system with poor morphology of the natively prepared active layer (no addition, no post-treatment), but have a significant effect on the morphology of the natively prepared active layer itself. A better system often has no adjustment effect or even has a negative impact, so additives that only act on the regulation of morphology have great limitations on the improvement of device performance.

Images