1 Subjects: “...photoconversion efficiency...”

2 Subjects: “...technical and super-efficiencies...”

3 Subjects: “...energy efficiency modelling...”

4 Subjects: “...energy-efficient...”

5 Subjects: “...technical efficiency...”

6 Subjects: “...computational efficiency...”

7 Subjects: “...efficiency...”

8 Subjects: “...eco-efficiency...”

9 Subjects: “...firm efficiency...”

10 Subjects: “...energy efficiency...”

11 Subjects: “...energy efficiency...”

12 Subjects: “...energy efficiency...”

13 Subjects: “...efficiency...”

14 Subjects: “...efficiency...”

15 Subjects: “...high efficiency...”

16 Subjects: “...high efficiency...”

17 Subjects: “...high efficiency...”