Lattice Anchoring Stabilizesα-FAPbI_(3) Perovskite for High-Performance X-Ray DetectorsOA
Formamidinium lead iodide(FAPbI_(3))perovskite exhibits an impressive X-ray absorption coefficient and a large carrier mobility-lifetime product(μτ),making it as a highly promising candidate for X-ray detection application.However,the presence of larger FA^(+)cation induces to an expansion of the Pb-I octahedral framework,which unfortunately affects both the stability and charge carrier mobility of the corresponding devices.To address this challenge,we develop a novel low-dimensional(HtrzT)PbI_(3) perovskite featuring a conjugated organic cation(1H-1,2,4-Triazole-3-thiol,HtrzT^(+))which matches well with theα-FAPbI_(3) lattices in two-dimensional plane.Benefiting from the matched lattice between(HtrzT)PbI_(3) andα-FAPbI_(3),the anchored lattice enhances the Pb-I bond strength and effectively mitigates the inherent tensile strain of theα-FAPbI_(3) crystal lattice.The X-ray detector based on(HtrzT)PbI_(3)(1.0)/FAPbI_(3) device achieves a remarkable sensitivity up to 1.83×10^(5)μC Gy_(air)^(−1) cm^(−2),along with a low detection limit of 27.6 nGy_(air) s^(−1),attributed to the release of residual stress,and the enhancement in carrier mobility-lifetime product.Furthermore,the detector exhibits outstanding stability under X-ray irradiation with tolerating doses equivalent to nearly 1.17×10^(6) chest imaging doses.
Yu-Hua Huang;Su-Yan Zou;Cong-Yi Sheng;Yu-Chuang Fang;Xu-Dong Wang;Wei Wei;Wen-Guang Li;Dai-Bin Kuang
Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of ChinaKey Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,GBRCE for Functional Molecular Engineering,School of Chemistry,IGCME,Sun Yat-Sen University,Guangzhou 510275,People’s Republic of China
能源科技
α-FAPbI_(3)perovskiteConjugated organic cationLattice anchoringPhase stabilityX-ray detectors
《Nano-Micro Letters》 2026 (1)
P.337-354,18
supports from the National Natural Science Foundation of China(22375220,U2001214,22471302)the Guangdong Basic and Applied Basic Research Foundation(2024B1515020101)Open Project Fund from State Key Laboratory of Optoelectronic Materials and Technologies(OEMT-2024-KF-08).
评论