Thursday, July 18, 2024

U.S. researchers construct 16%-efficient mini perovskite photo voltaic module proof against UV light-induced degradation – pv journal International


A US analysis group has constructed a 15 cm2 perovskite photo voltaic module with improved stability and effectivity because of a polymer gap transport layer that reportedly improves the panel’s stability and effectivity.

A US analysis group has developed a mini perovskite photo voltaic module based mostly on a particular polymer gap transport layer materials that reportedly improves the panel’s stability and effectivity.

“The sturdiness of perovskite modules has not been proven to attain the required 25-year lifetime in lots of functions,” corresponding writer of the analysis, Jinsong Huang, mentioned. pv journalfamous that the group was in a position to construct the panel after figuring out an ultraviolet (UV) light-induced perovskite degradation mechanism as one of many essential elements affecting perovskite module stability.

“We report the degradation mechanisms of pin-structured perovskite photo voltaic cells beneath unfiltered daylight and with LEDs,” the scientists defined, including that they have been the primary to seek out the reason for UV degradation attributable to exterior mild assessments the weak chemical bonding between the perovskite layer, the hole-transporting supplies (HTM) and the clear conducting oxide (TCO) layer on the cell degree. “This causes perovskite photo voltaic cell degradation beneath daylight with sturdy UV elements.”

To scale back the consequences of this degradation, scientists improved the perovskite photo voltaic cells used for mini modules with a hybrid HTM based mostly on the mixture of EtCz3EPA, a brand new molecule, and poly[bis(4-phenyl)-(246-trimethylphenyl)-aminebathocuproine(PTAA:BCP)[bis(4-phenyl)-(246-trimethylphenyl)-aminebathocuproine(PTAA:BCP)[bis(4-phenyl)-(246-trimethylphenyl)-aminebathocuproine(PTAA:BCP)[bis(4-phenyl)-(246-trimethylphenyl)-aminebathocuproine(PTAA:BCP)

This combination is said to have resulted in a stronger interconnection layer at the interface of the perovskite and the substrate in outdoor testing. “We improved the binding of the perovskite/HTM/TCO region through a phosphonic acid group that binds to TCO and through a nitrogen group that interacts with the lead of the perovskites,” explained the academics.

The cells are based on a substrate made of indium tin oxide (ITO), the novel HTM, the perovskite absorber, a buckminsterfullerene (C60) electron transport layer, bathocuproine (BCP), and a copper (Cu) metal contact.

The 15 cm2 perovskite solar module made with this cell configuration was able to achieve a power conversion efficiency of more than 16% and maintained these efficiency levels during about 29 weeks of outdoor testing. The results were independently verified by the US Department of Energy’s Perovskite PV Accelerator for Commercializing Technologies (PACT) accelerator.

“Real-world demonstration is a critical step toward commercialization, and we hope that through PACT offering these capabilities researchers and companies can use this data toward greater reliability,” said of researchers.

Their work is described in the paper “Strong bonding of hole-transport layers reduces ultraviolet degradation in perovskite solar cells,” published in Science. The research team has members from the University of North Carolina, the Colorado School of Mines, the National Renewable Energy Laboratory (NREL), the University of Toledo, and the University of California San Diego.

“This research is a true collaboration between organic synthetic chemists and solar cell device engineers working together to solve major problems. In addition, the chemistry of the preparation of the molecule of interest in this study is relatively simple and only the tip of the iceberg,” said Alan Sellinger, a professor at the Colorado School of Mines in a press release. Looking ahead to future research projects, Huang said the group will continue to “understand the mechanisms of degradation and find methods to overcome them.”

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