Ki Taeyoon, Jang Chelim, Jin Jong Sung, Kim Jehan, Kim Nara, Moon Heehun, Jang Soo-Young, Kwon Sooncheol, Jang Jubin, Kang Hongkyu, Lee Kwanghee
School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
Heeger Center for Advanced Materials (HCAM) and Research Institute of Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
ACS Appl Mater Interfaces. 2023 Oct 11;15(40):47317-47326. doi: 10.1021/acsami.3c09984. Epub 2023 Sep 27.
The development of an ideal solution-processable transparent electrode has been a challenge in the field of all-solution-processed semitransparent organic solar cells (ST-OSCs). We present a novel poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) top electrode for all-solution-processed ST-OSCs through in situ doping of PEDOT:PSS. A strongly polarized long perfluoroalkyl ( = 8) chain-anchored sulfonic acid effectively eliminates insulating PSS and spontaneously crystallizes PEDOT at room temperature, leading to outstanding electrical properties and transparency of PEDOT top electrodes. Doped PEDOT-based ST-OSCs yield a high power conversion efficiency of 10.9% while providing an average visible transmittance of 26.0% in the visible range. Moreover, the strong infrared reflectivity of PEDOT enables ST-OSCs to reject 62.6% of the heat emitted by sunlight (76.7% from infrared radiation), outperforming the thermal insulation capability of commercial tint films. This light management approach using PEDOT enables ST-OSCs to simultaneously provide energy generation and energy savings, making it the first discovery toward sustainable energy in buildings.
开发一种理想的可溶液加工透明电极一直是全溶液加工半透明有机太阳能电池（ST-OSCs）领域的一项挑战。我们通过对聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）进行原位掺杂，提出了一种用于全溶液加工ST-OSCs的新型PEDOT:PSS顶部电极。一条强极化的长全氟烷基（= 8）链锚定磺酸在室温下有效地消除了绝缘的PSS，并使PEDOT自发结晶，从而使PEDOT顶部电极具有出色的电学性能和透明度。基于掺杂PEDOT的ST-OSCs在可见光范围内的平均可见光透过率为26.0%的同时，实现了10.9%的高功率转换效率。此外，PEDOT的强红外反射率使ST-OSCs能够阻挡62.6%的太阳光发射热量（76.7%来自红外辐射），优于商业 tint 膜的隔热能力。这种使用PEDOT的光管理方法使ST-OSCs能够同时实现能源产生和节能，使其成为朝着建筑可持续能源方向的首个发现。
