Hot　exciton　organic　scintillators　offer　promising　prospects　due　to　their　efficient　generation　of　bright　triplet　excitons　and　ultrafast　response　time,　having　potential　applications　in　security　detection　and　medical　diagnostics.　However,　fabricating　large-area,　highly　transparent　scintillator　screens　still　remains　challenging,　impeding　the　realization　of　high-resolution　X-ray　imaging.　Herein,　we　firstly　demonstrate　a　novel　highly-transparent　hot　exciton　organic　glassy　scintillator　(＞87%　transmittance　@　450-800　nm),　produced　using　a　low-temperature　melt-quenching　method　with　2′,5′-difluoro-N4,N4,N4′′,N4′′-tetraphenyl-[1,1′:4′,1′′-terphenyl]-4,4′′-diamine　(DTPA2F)　powder.　Remarkably,　compared　to　crystalline　DTPA2F,　which　has　a　photoluminescence　quantum　yield　of　67.8%　and　a　relative　light　yield　of　46　400　±　406　photons　MeV−1,　the　DTPA2F　glass　retains　49.8%　and　28　341　±　246　photons　MeV−1,　respectively.　This　results　in　a　low　detection　limit　of　about　53.7　nGy　s−1　and　an　ultrafast　decay　time　of　1.66　ns　for　DTPA2F　glass.　Besides,　it　exhibits　excellent　environmental　stability　with　no　recrystallization　or　degradation　after　over　100　days　of　exposure　to　ambient　conditions.　Furthermore,　the　scintillator　screen　demonstrates　exceptional　spatial　resolution　of　38.5　lp　mm−1　for　X-ray　imaging.　It　provides　a　simple　molecular　design　strategy　and　a　screen　fabrication　method　for　developing　large-area,　highly-transparent,　efficient　and　ultrafast　organic　glassy　scintillators.　©　2024　The　Royal　Society　of　Chemistry.