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Updated: Jun 24, 2026

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

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Cesium-Based Molecular Perovskites With Superior Stability for High-Performance X-Ray Detection.

Liang Wu¹, Qingsong Wei², Yiming Di¹

¹College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)

|January 16, 2025

Summary

This summary is machine-generated.

New cesium-based molecular perovskites offer enhanced X-ray detection. MDABCO-CsBr3 shows superior stability and high sensitivity, making it ideal for advanced radiation detection applications.

Keywords:

X‐ray detection cesium‐substituted environmental stability molecular perovskite

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Area of Science:

Materials Science
Solid-state Chemistry
Radiation Detection

Background:

Metal-free molecular perovskites are promising for X-ray detection due to tunable properties and low toxicity.
Limited X-ray absorption and environmental instability hinder their practical use.

Purpose of the Study:

To develop cesium-based molecular perovskites (MDABCO-CsX3) for improved X-ray detection.
To investigate the impact of halide composition (Cl, Br, I) on material properties and device performance.

Main Methods:

Synthesis of MDABCO-CsX3 perovskites with varying halides.
Systematic investigation of physical properties and X-ray detection performance.
Analysis of environmental and thermal stability.

Main Results:

MDABCO-CsBr3 demonstrated superior environmental stability due to optimal Br- ionic radius and chemical stability.
Higher tolerance factor in MDABCO-CsBr3 promoted a stable cubic structure and reduced ion migration.
MDABCO-CsBr3 detectors achieved high sensitivity (4124 µC Gy-1 cm-2), low detection limit (0.45 µGy s-1), and excellent thermal stability up to 130 °C.

Conclusions:

MDABCO-CsBr3 is a highly stable and efficient material for X-ray detection.
Cesium incorporation and halide modulation are effective strategies to enhance molecular perovskite performance.
These findings pave the way for advanced molecular perovskite applications in radiation detection.