Flexible　scintillator　screens　characterized　by　high　spatial　resolution,　low　cost,　and　a　simple　fabrication　process　are　in　significant　demand　for　applications　in　medical　diagnosis　and　industrial　detection.　Here,　we　have　demonstrated　a　new　Mn2+-doped　two-dimensional　(2D)　Ruddlesden-Popper　type　perovskite,　(4-tert-butylbenzylamine)2PbBr4:Mn,　serving　as　a　highly　efficient　scintillator　candidate.　Doping　with　Mn2+　induces　a　spin-forbidden　internal　transition　(4T1g　→　6A1g)　that　enhances　the　energy-transfer　efficiency　from　the　strongly　bound　excitons　of　the　host　material　to　the　d　electrons　of　the　Mn2+　ions,　ultimately　leading　to　intense　orange-red　emission.　This　process　enhances　the　photoluminescence　quantum　yield　of　(4-tert-butylbenzylamine)2PbBr4　(1)　and　decreases　its　self-absorption.　Therefore,　at　the　optimal　Mn2+-doping　concentration,　1:8.4%Mn2+　demonstrates　a　high　light　yield　of　21,532　Ph/MeV　and　a　low　detection　limit　of　198.19　nGyair　s-1,　exceeding　the　performance　of　a　commercial　bismuth　germanium　oxide　(BGO)　scintillator.　Furthermore,　we　combined　ultrafine　powders　of　1:8.4%Mn2+　with　poly(dimethylsiloxane)　to　fabricate　flexible　scintillator　films.　With　the　optimal　film　thickness　and　mass　percentage　of　1:8.4%Mn2+,　the　scintillator　films　achieve　their　maximum　spatial　resolution　of　17.3　lp　mm-1.　The　above　results　indicate　that　the　exceptional　flexible　scintillation　imaging　performance　of　1:8.4%Mn2+　effectively　addresses　the　shortcomings　of　current　commercial　scintillators,　thereby　providing　a　new　option　for　the　scintillator　family.　©　2025　American　Chemical　Society.