A photoelectric conversion element (an experimental example 17) was fabricated by a method similar to that in the experimental example 8, except that a photoelectric conversion layer was formed by using two kinds of benzothienobenzothiophene derivatives represented by the formula (1-8) and the formula (1-7) and C60 fullerene (the formula (2) described above).
A photoelectric conversion element (an experimental example 18) was fabricated by a method similar to that in the experimental example 9, except that a photoelectric conversion layer was formed by using two kinds of benzothienobenzothiophene derivatives represented by the formula (1-9) and the formula (1-7) and C60 fullerene (the formula (2) described above).
A photoelectric conversion element (an experimental example 19) was fabricated by a method similar to that in the experimental example 10, except that a photoelectric conversion layer was formed by using two kinds of benzothienobenzothiophene derivatives represented by the formula (1-10) and the formula (1-7) and C60 fullerene (the formula (2) described above).
A photoelectric conversion element (an experimental example 20) was fabricated by a method similar to that in the experimental example 1, except that a photoelectric conversion layer was formed by using DNTT represented by the following formula (5) and C60 fullerene (the formula (2) described above).