 This study investigates the dipole formed at the interface between molybdenum trioxide, M003, and conjugated polymer, 2,3-bis, 3-octaloxafenol, quinoxylen-5, 8-dial altyofine-2, 5-dial, TQ1, 6,6, phenyl C71 butyric acid methyl ester, PC71BM, in polymer-based organic photovoltaic cells. The dipole has a significant impact on charge transport across the interface and is determined using electron spectroscopy and neutral impact collision ion scattering spectroscopy. Metastable induced electron and UV photoelectron spectroscopy are used to determine the enclosed surface coverage of minimum 1.5 nanometers M003 and a maximized dipole strength of 2.4EV with greater than 2 nanometers M003 deposition on BHJ. The study shows that air exposure reduces the dipole at the interface leading to a decrease in cell performance. The findings suggest that the reduction in dipole might not be the only mechanism leading to cell performance degradation and have relevance for other BHJ systems because M003 as a high work function material is likely to interact with other organic materials in a similar way. This article was authored by Yantangine, Sunpan, Matzr Anderson, and others. We are article.tv, links in the description below.