Kim Hyo-Han, Kim Do Hoon, Choi Bo Gyu, Kim Da Hee, Oh Si Duck, Shin Dong Hee, Lee Hosun
Institute of Advanced Technology Korea, ULVAC Korea Ltd, Pyeongtaek 17792, Republic of Korea.
Department of Smart Sensors Engineering, Andong National University, Andong, Gyeongbuk 36729, Republic of Korea.
Nanotechnology. 2024 Sep 25;35(49). doi: 10.1088/1361-6528/ad7b3d.
Semitransparent solar cells are attracting attention not only for their visual effects but also for their ability to effectively utilize solar energy. Here, we demonstrate a translucent solar cell composed of bis(trifluoromethane sulfonyl)-amide (TFSA)-doped graphene (Gr), graphene quantum dots (GQDs), and LaVO. By introducing a GQDs intermediate layer at the TFSA-Gr/LaVOinterface, we can improve efficiency by preventing carrier recombination and promoting charge collection/separation in the device. As a result, the efficiency of the GQDs-based solar cell was 4.35%, which was higher than the 3.52% of the device without GQDs. Furthermore, the average visible transmittance of the device is 28%, making it suitable for translucent solar cells. The Al reflective mirror-based system improved the power conversion efficiency by approximately 7% compared to a device without a mirror. Additionally, the thermal stability of the device remains at 90% even after 2000 h under an environment with a temperature of 60 °C and 40% relative humidity. These results suggest that TFSA-Gr/GQDs/LaVO-based cells have a high potential for practical use as a next-generation translucent solar energy power source.
半透明太阳能电池不仅因其视觉效果，还因其有效利用太阳能的能力而备受关注。在此，我们展示了一种由双（三氟甲烷磺酰）酰胺（TFSA）掺杂的石墨烯（Gr）、石墨烯量子点（GQDs）和LaVO组成的半透明太阳能电池。通过在TFSA-Gr/LaVO界面引入GQDs中间层，我们可以通过防止载流子复合并促进器件中的电荷收集/分离来提高效率。结果，基于GQDs的太阳能电池效率为4.35%，高于不含GQDs的器件的3.52%。此外，该器件的平均可见光透射率为28%，使其适用于半透明太阳能电池。与没有镜子的器件相比，基于铝反射镜的系统将功率转换效率提高了约7%。此外，即使在温度为60°C、相对湿度为40%的环境中放置2000小时后，该器件的热稳定性仍保持在90%。这些结果表明，基于TFSA-Gr/GQDs/LaVO的电池作为下一代半透明太阳能电源具有很高的实际应用潜力。
