Ligand, ligand quantum dot, quantum dot layer and method for patterning the same

A cleavage-type ligand for quantum dots, having any one of structures shown in the following Formulas I and V to IX:

• wherein in Formula I, A is a first ligand unit, B is a cleavage unit, and C is an adhesion adjusting unit;
• wherein the first ligand unit A is at least one selected from mercapto, hydroxyl, amino, carboxyl, a phosphate group, a phosphate ester group, and a sulfonic group;
• wherein the cleavage unit B is at least one selected from structures shown in the following Formulas III and IV:
• in the above Formulas III and IV, R5, R6, R7 and R8 are independently selected from alkylene and arylene;
• wherein the adhesion adjusting unit C is at least one selected from a perfluoroalkyl group containing 4 or more carbon atoms, a group containing 3 or more hydrophilic functional groups, and a molecular chain containing 3 or more hydrophilic functional groups, and the hydrophilic functional groups comprises hydroxyl, aldehyde group, an ester group and an ether group.