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. 2014 Aug 14;4:6071. doi: 10.1038/srep06071

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(A) PL of the MDMO-PPV:PCBM at open (black line) and short circuit (red line) conditions highlighting the negligible loading dependence. (B) The MAPI cell displays in contrary substantially different PL quenching behavior under device open (black line) and short circuit (red line) conditions. Inset shows the same data on a linear scale. EL spectra are further included in both graphs to emphasize their spectral position related to PL as well as their spectral shape independence on injection conditions. The units on the Y-axis are no longer absolute, but still correspond to m⁻²s⁻¹eV⁻¹.