Organic compound and use thereof, passivation film, solar battery, and electrical apparatus

An organic compound, shown as in formula (1):

• Ar-(L-R1)n1 (1),
• wherein Ar is selected from any one of substituted or unsubstituted aryl with 6 to 50 ring atoms, substituted or unsubstituted heteroaryl with 5 to 50 ring atoms, and arylamino as shown in formula (A):
• L is selected from acyclic alkylene with 1 to 10 carbon atoms;
• R1 is an oxyacid group;
• Ar1 to Ar3 are independently selected from any one of H, substituted or unsubstituted alkenyl with 2 to 30 carbon atoms, and substituted or unsubstituted aryl with 7 to 30 carbon atoms, respectively, and at least one of Ar1 to Ar3 is selected from substituted or unsubstituted aryl with 7 to 30 carbon atoms;
• n1 is selected from any integer from 1 to 3;
• or the organic compound is an oxyacid radical salt of the compound as shown in formula (1).