An underestimated photoactive area in organic solar cells based on a ZnO interlayer

Z. Chen, J. Wang, H. Jin, J. Yang, Q. Bao, Z. Ma, W. Tress and Z. Tang

J. Mater. Chem. C (2021)

https://pubs.rsc.org/en/content/articlelanding/2021/tc/d1tc00745a

The authors studied the impact of the resistance of a sol-gel-grown ZnO interlayer on the efficiency of an organic solar cell. They find that the UV-induced doping effect leads to a significantly reduced ZnO resistance, which gives rise to an underestimated photoactive area and thus overestimated short-circuit current density (Jsc) Therefore, the validity of the argument that high-resistance interlayers do not lead to overestimated Jsc should always be carefully evaluated. Current-voltage characteristics were simulated using the large-area semiconductor simulator LAOSS