High-performance large-area perovskite submodules for solar cells

Surface redox engineering of vacuum-deposited NiOx for top-performance perovskite solar cells and modules
Credit: DICP

Perovskite solar cells (PSCs) are promising solar technologies. Although low-cost wet processing has shown advantages in small-area PSC fabrication, the preparation of uniform charge transport layers with thickness of several nanometers from solution for meter-sized large area products is still challenging.

Recently, a research group led by Prof. LIU Shengzhong from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) has developed a facile surface redox engineering (SRE) strategy for vacuum-deposited NiOx to match the slot-die-coated perovskite, and fabricated high-performance large-area perovskite submodules.

This work was published in Joule on July 21.

Inverted PSCs are potentially more valuable than their normal counterparts because the former have easily-mitigated hysteresis behavior and long-term durability. NiOx has been demonstrated as the hole transport materials for inverted PSCs. But for most vacuum-processed NiOx films, the relatively hydrophobic surface attenuates the adhesion of perovskite ink, making it challenging to deposit large-area perovskite films.

Moreover, the surface chemistry of NiOx is rather complex as a large number of high-oxidative-state Ni species and chemically reactive hydroxyls can decompose perovskites, leading to an interface energy barrier and noncapacitive hysteresis.

The SRE strategy not only eliminates the local de-wetting problem of perovskite ink, thus achieving uniform polycrystalline perovskite films at the decimeter level, but also imparts enhanced performance in electronic properties, stability, mechanical adhesion at the buried interface via modulating the NiOx surface features.

In this study, the researchers achieved high-performance PSCs with stability of thousands of hours under various stressed conditions and outstanding photovoltaic performance. The power conversion efficiencies of PSCs were 23.4% and 21.3% for rigid and flexible devices, respectively.

Furthermore, due to the scalability of SRE strategy to large-area configurations, they assembled perovskite submodules of area 156 × 156 mm2 with a remarkable efficiency of 18.6% along with negligible hysteresis and good stability.

“The SRE strategy provides a proof of concept for combining vacuum-fabricated charge transport layers with wet-processed perovskites and facilitates the stacking engineering of large-scale, uniform thin films for the development of efficient and stable perovskite modules,” said Prof. LIU.

Journal: Joule
DOI: 10.1016/j.joule.2022.06.026
Method of Research: Commentary/editorial
Subject of Research: Not applicable
Article Title: Surface redox engineering of vacuum-deposited NiOx for top-performance perovskite solar cells and modules
Article Publication Date: 21-Jul-2022

Media Contact

Jean Wang
Dalian Institute of Chemical Physics, Chinese Academy Sciences
wangyj@dicp.ac.cn
Office: 41182464221

www.dicp.ac.cn

Media Contact

Jean Wang
Dalian Institute of Chemical Physics, Chinese Academy Sciences

All latest news from the category: Power and Electrical Engineering

This topic covers issues related to energy generation, conversion, transportation and consumption and how the industry is addressing the challenge of energy efficiency in general.

innovations-report provides in-depth and informative reports and articles on subjects ranging from wind energy, fuel cell technology, solar energy, geothermal energy, petroleum, gas, nuclear engineering, alternative energy and energy efficiency to fusion, hydrogen and superconductor technologies.

Back to home

Comments (0)

Write a comment

Newest articles

Better magnets for green energy

Researchers use multicomponent alloys to make strong and ductile soft magnetic materials. Latest results now published in the journal Nature. Soft magnetic materials (SMMs) applied in electric engines transform energy…

Sound plus electrical body stimulation has potential to treat chronic pain

New technique could relieve pain for individuals with various chronic and neurological conditions. A University of Minnesota Twin Cities-led team has found that electrical stimulation of the body combined with…

Bioengineered cornea can restore sight to the blind and visually impaired

Bioengineered corneal tissue for minimally invasive vision restoration in advanced keratoconus in two clinical cohorts. Researchers and entrepreneurs have developed an implant made of collagen protein from pig’s skin, which…

Partners & Sponsors