Organic single-crystalline heterojunction composite film, preparation method thereof and method of using the same

An organic single-crystalline heterojunction composite film, wherein the organic single-crystalline heterojunction composite film comprises M organic materials, and M is a positive integer greater than or equal to 2;

• the organic single-crystalline heterojunction composite film comprises a laminated structure, wherein the laminated structure refers to the organic single-crystalline heterojunction composite film is composed of N layers of organic single-crystalline thin films stacked in sequence, and N is a positive integer greater than or equal to 2;
• the organic single-crystalline thin film is composed of the organic single crystal array;
• the organic single-crystalline heterojunction composite film comprises at least one organic single-crystalline efficiently coupled unit;
• the organic single-crystalline efficiently coupled unit is composed of an organic single-crystalline thin film MT and an organic single-crystalline thin film MB, and the organic single-crystalline efficiently coupled unit has highly efficient lamination;
• MT and MB are laminated together;
• materials constituting MT and MB are different;
• the highly efficient lamination of the organic single-crystalline efficiently coupled unit refers that a lamination area ratio R is ≥50%;
• the lamination area ratio R=Atotal/Alarge, wherein Atotal refers to a lamination area between the two organic single-crystalline thin films which constitute the organic single-crystalline efficiently coupled unit, and Alarge refers to an area of the larger one in the two thin films.