Data for: Digital Printing of Efficient Dye-Sensitized Solar Cells (DSSCs)

This study reports on the deposition of TiO2 nanoparticles and the sensitization of the photoanode by a new digital printing technology, named Digital Materials Deposition “DMD” to fabricate semi-transparent DSSCs. In this study, the push-pull dye coded “D35” and I3−/I− were used respectively as sensitizer and redox mediator. The photovoltaic performances of the solar cells printed with the DMD technology were compared to those prepared by the conventional method consisting of screen-printed nanoparticles and dying process by overnight soaking of the electrode into a solution of the sensitizer. Scanning Electron Microscopy shows that the DMD printed film is more porous than the one deposited by screen printing. The cells prepared by DMD give higher solar energy conversion efficiency (Jsc= 12.65 mA/cm2, Voc= 775 mV, FF=75%, PEC=7.4%) than with conventional screen-printing technique (Jsc = 10.03 mA/cm2, Voc= 760 mV, FF =72 %, PEC=5.48%). IMVS/IMPS measurements demonstrate that the superior photocurrent density delivered by DMD printed solar cells is due to a higher charge collection efficiency. Overall, this study demonstrates that DMD technology simplifies the DSSC fabrication process with a reduction of the material consumption and it is quick and efficient representing an innovative and attractive method to manufacture DSSCs.

本研究报道了采用一种名为数字材料沉积（Digital Materials Deposition，DMD）的新型数字印刷技术，沉积二氧化钛（TiO₂）纳米颗粒并敏化光阳极，以制备半透明染料敏化太阳能电池（Dye-Sensitized Solar Cells, DSSCs）。本研究分别采用编号为"D35"的推挽型染料与三碘化物/碘化物（I₃⁻/I⁻）作为敏化剂与氧化还原介质。将采用DMD技术制备的太阳能电池的光伏性能，与传统方法制备的电池进行对比：传统方法先通过丝网印刷沉积纳米颗粒，再将电极置于敏化剂溶液中浸泡过夜以完成敏化过程。扫描电子显微镜（Scanning Electron Microscopy, SEM）表征结果显示，DMD印刷制备的薄膜孔隙率高于丝网印刷制备的薄膜。采用DMD技术制备的电池，其太阳能转换性能更优：短路电流密度（Jsc）=12.65 mA/cm²、开路电压（Voc）=775 mV、填充因子（FF）=75%、光电转换效率（PEC）=7.4%；而传统丝网印刷技术制备的电池对应参数为Jsc=10.03 mA/cm²、Voc=760 mV、FF=72%、PEC=5.48%。强度调制光电压谱（IMVS）/强度调制光电流谱（IMPS）测试结果表明，DMD印刷太阳能电池所获得的更高光电流密度，源于更高的电荷收集效率。总体而言，本研究证实，DMD技术可简化染料敏化太阳能电池的制备流程，降低材料消耗，且兼具高效快捷的优势，是一种极具创新性与应用吸引力的染料敏化太阳能电池制备方法。