Highly efficient and high peak transmittance colorful semitransparent organic solar cells with hybrid-electrode-mirror microcavity structure

Microcavity is an efficient approach to manufacture the colorful semitransparent organic solar cells (ST-OSCs) with high color purity by tailoring the transmission spectrum to narrow peak. However, in this type of colorful semitransparent devices, high power conversion efficiency (PCE) and high peak transmittance are not yet simultaneously achieved. This work proposes a new type of microcavity structure to achieve colorful ST-OSCs with both high PCE and high peak transmittance, in which hybrid Au/Ag electrode is used as mirror and WO3 as spacer layer. Firstly, it is demonstrated that the hybrid Au/Ag electrode mirror brings about an improvement of 7.7% and 5.5% for both the PCE and peak transmittance, respectively, when compared with reference devices using Ag electrode mirror. Specifically, the PCEs of the optimized devices reach the satisfactory value of over 9%, and the peak transmittance is over 25%. This value of PCE is the highest one reported so far for the microcavity-based ST-OSCs with the same p...