Provided is a platinum complex having a structure represented by formula (I):(I)wherein A1 to A3 each independently represent a 5-membered or 6-membered unsaturated ring, A3 is optionally formed between A1 and A2; X1, X2 and X3 independently represent carbon or nitrogen; R1 represents hydrogen, substituted or unsubstituted C1-C6 alkyl, -CF2H, -CFH, substituted or unsubstituted C6-C12 aryl or -CmF2m+1, m is an integer of 1 to 5; R2 and R3 independently represent hydrogen, C1-C12 alkyl, substituted or unsubstituted C1-C6 alkoxyl, substituted or unsubstituted C6-C12 aryl or -CnF2n+1, n is an integer of 0 to 3; p and q independently represent an integer of 1 to 2; and when p or q is equal to 2, two R2’s or R3’s may join to form a C3-8 N-heteroaromatic or aromatic ring. |