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2D Ruddlesden-Popper X-FPEA2PbI4 perovskites for highly stable PeLED with improved opto-electro-mechanical
Samad Shokouhi1, Seyedeh Bita Saadatmand1, Vahid Ahmadi2
1Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran.
Scientific Reports
|July 2, 2025
Summary
Para-FPEA2PbI4 perovskites show enhanced stability and a higher bandgap, making them ideal for perovskite light-emitting diodes (PeLEDs). Their improved thermal stability and emission spectrum resilience offer potential for durable optoelectronic devices.
Area of Science:
- Materials Science
- Solid-State Physics
- Optoelectronics
Background:
- Ruddlesden-Popper perovskites are promising materials for optoelectronic applications.
- Tuning the structural configurations of perovskites influences their opto-electro-mechanical properties.
- Perovskite light-emitting diodes (PeLEDs) require materials with high efficiency and stability.
Purpose of the Study:
- To investigate the opto-electro-mechanical characteristics and stability of Ruddlesden-Popper X-FPEA2PbI4 perovskites.
- To compare the properties of para (p), meso (m), and ortho (o) configurations.
- To identify the most suitable configuration for active layers in PeLEDs.
Main Methods:
- Computational investigation of opto-electro-mechanical properties.
- Analysis of bandgap, formation energy, and stability under temperature fluctuations.
- Evaluation of internal quantum efficiencies and emission spectrum stability.
Main Results:
- Bandgap increases progressively from p-FPEA2PbI4 (2.097 eV) to m-FPEA2PbI4 (2.133 eV) and o-FPEA2PbI4 (2.177 eV).
- p-FPEA2PbI4 exhibits superior stability with higher formation energy (-4.825 eV) compared to m- and o-configurations.
- p-FPEA2PbI4 shows enhanced stability against temperature fluctuations (0.01 1/K efficiency dependence, 0.0156 nm/K spectrum dependence).
Conclusions:
- p-FPEA2PbI4 is a leading candidate for PeLED active layers due to its superior stability.
- While p-FPEA2PbI4's efficiency is slightly lower than PEA2PbI4, its enhanced thermal and spectral stability is advantageous.
- This research paves the way for more reliable and durable light-emitting devices.
