Related Experiment Video
Updated: Sep 7, 2025
10:31
Developing High Performance GaP/Si Heterojunction Solar Cells
Published on: November 16, 2018
7.6K
Highly Efficient and Stable 2D Dion Jacobson/3D Perovskite Heterojunction Solar Cells
Yukta1, Nishi Parikh2, Rohit D Chavan1
1Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India.
ACS Applied Materials & Interfaces
|June 21, 2022
Summary
This study introduces stable and efficient 2D/3D perovskite solar cells by passivating 3D perovskites with ammonium thiocyanate and capping with 2D perovskites. This approach enhances power conversion efficiency (PCE) and device stability.
Area of Science:
- Materials Science
- Renewable Energy
- Solid-State Physics
Background:
- Two-dimensional/three-dimensional (2D/3D) perovskite heterostructures offer combined photovoltaic performance and stability.
- 3D perovskites provide high efficiency, while 2D perovskites enhance stability.
Purpose of the Study:
- To develop highly stable and efficient 2D/3D perovskite solar cells (PSCs).
- To investigate the passivation effect of ammonium thiocyanate (NH4SCN) on 3D methylammonium lead triiodide (MAPbI3) and the role of a 2D perovskite capping layer.
Main Methods:
- Fabrication of NH4SCN-passivated MAPbI3 (3D) perovskite layers.
- Deposition of a 2D perovskite capping layer using xylylene diammonium iodide (XDAI).
- Characterization using Field Emission Scanning Electron Microscopy (FESEM) and Ultraviolet Photoemission Spectroscopy (UPS).
Main Results:
- NH4SCN-passivated MAPbI3 PSCs achieved a power conversion efficiency (PCE) of 19.6%, compared to 17.18% for pristine MAPbI3 PSCs.
- The champion 2D/3D perovskite heterojunction solar cells reached a PCE of 20.74%.
- Reduced defect density and suppressed nonradiative recombination losses contributed to the efficiency increase.
Conclusions:
- The 2D/3D perovskite heterojunction architecture significantly enhances PCE and stability.
- The hydrophobic 2D capping layer provides excellent moisture, thermal, and UV resistance.
- This work demonstrates a promising strategy for developing highly stable and efficient perovskite solar cells.
Related Concept Videos
01:11P-N junction
673
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...
673
01:27Schottky Barrier Diode
482
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
482
02:47Voltaic/Galvanic Cells
58.4K
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,...
58.4K