State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2019 Oct;31(42):e1904512. doi: 10.1002/adma.201904512. Epub 2019 Sep 6.
Organic photovoltaic (OPV) technologies have the advantages of fabricating larger-area and light-weight solar panels on flexible substrates by low-cost roll-to-toll production. Recently, OPV cells have achieved many significant advances with power conversion efficiency (PCE) increasing rapidly. However, large-scale solar farms using OPV modules still face great challenges, such as device stability. Herein, the applications of OPV cells in indoor light environments are studied. Via optimizing the active layers to have a good match with the indoor light source, 1 cm OPV cells are fabricated and a top PCE of 22% under 1000 lux light-emitting diode (2700 K) illumination is demonstrated. In this work, the light intensities are measured carefully. Incorporated with the external quantum efficiency and photon flux spectrum, the integral current densities of the cells are calculated to confirm the reliability of the photovoltaic measurement. In addition, the devices show much better stability under continuous indoor light illumination. The results suggest that designing wide-bandgap active materials to meet the requirements for the indoor OPV cells has a great potential in achieving higher photovoltaic performance.
有机光伏 (OPV) 技术具有在柔性衬底上通过低成本的卷对卷生产制造大面积和轻质太阳能电池板的优势。最近，OPV 电池在功率转换效率 (PCE) 方面取得了许多重大进展，迅速提高。然而，使用 OPV 模块的大型太阳能农场仍然面临着巨大的挑战，例如器件稳定性。在此，研究了 OPV 电池在室内光环境中的应用。通过优化活性层以与室内光源良好匹配，制造了 1 cm 的 OPV 电池，并在 1000 lux 发光二极管（2700 K）照明下展示了 22%的顶 PCE。在这项工作中，仔细测量了光强。结合外量子效率和光子通量谱，计算了电池的积分电流密度，以确认光伏测量的可靠性。此外，该器件在连续室内光照射下表现出更好的稳定性。结果表明，设计满足室内 OPV 电池要求的宽带隙活性材料在实现更高的光伏性能方面具有很大的潜力。
