Low-dimensional　organic-inorganic　hybrid　copper(I)　compounds　have　attracted　much　attention　due　to　their　high　luminescence　efficiency　and　non-toxicity.　In　this　study,　we　synthesized　three　novel　centimeter-scale　Cu(I)-based　hybrid　[1,2-PDA]CuX3　3　(X=Cl,　=Cl,　Br,　I)　single　crystals　using　the　solvent　evaporation　method.　[1,2-PDA]CuCl3　3　and　[1,2-PDA]CuBr3　3　exhibit　zero-dimensional　crystal　structures　composed　of　separated　binary　edge-sharing　[CuX4]3-　4　]　3-　(X=Cl,　=Cl,　Br)　tetrahedra,　while　[1,2-PDA]CuI3　3　exhibits　a　one-dimensional　crystal　structure　composed　of　chains　of　corner-sharing　[CuI4]3-tetrahedra.　4　]　3-　tetrahedra.　The　photoluminescence　emission　of　[1,2-PDA]CuX3　3　(X=I,　=I,　Cl,　Br)　ranges　from　cyan　to　purple　light　at　room　temperature,　showing　a　tunable　pattern　with　the　halogen　changes.　The　photoluminescence　quantum　yield　of　the　[1,2-PDA]CuI3　3　single　crystal　was　measured　to　be　33.5　%.　Density　functional　theory　calculations　demonstrate　that　all　three　single　crystals　have　direct　bandgaps.　The　emission　mechanisms　of　[1,2-PDA]CuI3　3　single　crystals　were　investigated　by　temperature-dependent　photoluminescence　spectroscopy,　and　the　broadband　emissions　were　found　to　be　typical　of　self-trapped　exciton　emission.　It　is　worth　mentioning　that　the　discovery　of　low　toxic,　stable,　and　inexpensive　copper(I)　compounds　paves　the　way　for　considering　low-cost　and　environmentally　friendly　copper　halides　for　practical　applications.