Related Experiment Video
Updated: Jul 10, 2026
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
18.7K
Tuning an Electrode Work Function Using Organometallic Complexes in Inverted Perovskite Solar Cells.
Jiantao Wang1,2, Jinhua Li3, Yecheng Zhou4
1Department of Materials Science and Engineering, Southern University of Science and Technology, Xueyuan Avenue 1088, Shenzhen 518055, China.
Journal of the American Chemical Society
|April 27, 2021
Summary
New organometallic complexes significantly enhance perovskite solar cell (PSC) stability and efficiency by reducing metal work function (WF). These cathode interlayers improve device performance and longevity, even with high-work-function metals like gold.
Area of Science:
- Materials Science
- Photovoltaics
- Chemistry
Background:
- Low-work-function (WF) metals (Ag, Al, Cu) as external cathodes in inverted perovskite solar cells (PSCs) degrade due to oxidation and corrosion, limiting device stability.
- Cathode interlayers (CILs) can reduce metal WF and boost power conversion efficiency (PCE), but struggle with high-WF metals like gold (Au).
Purpose of the Study:
- To develop novel organometallic complexes as CILs for tuning electrode WF in inverted PSCs.
- To improve the PCE and long-term stability of PSCs using these new CILs.
Main Methods:
- Synthesis of carbolong-derived organometallic complexes.
- Density functional theory (DFT) calculations and surface characterizations to analyze WF reduction mechanisms.
- Fabrication and testing of inverted PSCs with modified Ag and Au cathodes.
Main Results:
- Organometallic complexes form anion-cation dipoles on metal surfaces, drastically reducing WF.
- Silver (Ag) cathode PSCs achieved a boosted PCE of 21.29% and a fill factor of 83.52% due to dipole-enhanced carrier transport.
- Gold (Au) cathode PSCs showed improved environmental stability, with no efficiency loss after 4080 h of storage.
Conclusions:
- Synthesized organometallic complexes effectively reduce metal WF, enhancing PSC performance.
- These CILs enable the use of high-WF metals like Au for superior PSC stability and efficiency.
- The findings offer a promising strategy for developing stable and efficient perovskite solar cells.
Related Concept Videos
02:47Voltaic/Galvanic Cells
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
01:11P-N junction
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
01:24Types of Reversible Electrodes
For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...