An　artificial　synaptic　device　that　can　provide　color　discrimination,　image　storage,　and　image　recognition　is　highly　required　to　mimic　the　human　vision　for　biological　robots.　All-inorganic　halide　perovskites　have　attracted　extensive　attention　for　the　reason　of　their　high　stability　and　favorable　photoelectric　properties.　In　this　study,　a　light-stimulated　synaptic　phototransistor　based　on　a　CsPbBr3/organic　semiconductor　hybrid　film　is　reported.　The　fabricated　CsPbBr3　film　exhibits　an　island　structure,　which　reduces　the　hysteresis　effectively　and　at　the　same　time　achieves　a　high　specific　detectivity　of　up　to　2　×　1015　Jones.　The　decay　of　the　photocurrent　can　be　delayed　by　changing　the　gate　bias,　which　is　essential　for　achieving　high-performance　light-stimulated　synaptic　devices.　Due　to　the　outstanding　detectivity　of　the　device,　the　obvious　synaptic　functions　can　be　observed　when　triggered　by　a　light　signal　with　a　power　of　1.6　nW　that　is　much　weaker　than　previous　most　perovskite-based　hybrid　synaptic　phototransistors　under　a　low　operating　voltage　of　-1　V.　The　electrical　power　consumption　of　the　device　could　be　as　low　as　0.076　pJ　when　the　power　of　light　spike　was　7.36　nW.　Taking　into　account　this　characterization,　with　changing　of　light　intensity　or　wavelength,　the　contrast　of　the　image　was　enlarged,　which　can　further　promote　the　image　recognition　accuracy.　More　significantly,　this　CsPbBr3/TIPS　hybrid　film　can　be　fabricated　by　facile　and　low-cost　solution　processes.　This　study　indicates　the　great　potential　of　solution-processed　perovskite-based　light-stimulated　synapses　for　future　artificial　visual　systems.　©　2021　American　Chemical　Society.