Thambidurai M, Omer Mohamed I, Shini Foo, Dewi Herlina Arianita, Jamaludin Nur Fadilah, Koh Teck Ming, Tang Xiaohong, Mathews Nripan, Dang Cuong
Centre for OptoElectronics and Biophotonics (COEB), School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
Energy Research Institute @NTU (ERI@N), Research Techno Plaza X-Frontier Block, Level 5, 50 Nanyang Drive, 637553, Singapore.
ChemSusChem. 2022 Apr 22;15(8):e202102189. doi: 10.1002/cssc.202102189. Epub 2022 Mar 23.
While extensive research has driven the rapid efficiency trajectory noted to date for organic-inorganic perovskite solar cells (PSCs), their thermal stability remains one of the key issues hindering their commercialization. Herein, a significant reduction in surface defects (a precursor to perovskite instability) could be attained by introducing triphenylphosphine (TPP), an effective Lewis base passivator, to the vulnerable perovskite/spiro-OMeTAD interface. Not only did TPP passivation enable a high power conversion efficiency (PCE) of 20.22 % to be achieved, these devices also exhibited superior ambient and thermal stability. Unlike the pristine device, which exhibited a sharp descend to 16 % of its initial PCE on storing in relative humidity of 10 %, at 85 °C for more than 720 h, the TPP-passivated devices retained 71 % of its initial PCE. Hence, this study presents a facile yet excellent approach to attain high-performing yet thermally stable PSCs.
尽管广泛的研究推动了有机-无机钙钛矿太阳能电池（PSC）达到了目前所记录的快速效率提升轨迹，但其热稳定性仍然是阻碍其商业化的关键问题之一。在此，通过将三苯基膦（TPP，一种有效的路易斯碱钝化剂）引入易受影响的钙钛矿/螺环-OMeTAD界面，可以显著减少表面缺陷（钙钛矿不稳定性的一个先兆）。TPP钝化不仅使功率转换效率（PCE）达到了20.22%，这些器件还表现出优异的环境稳定性和热稳定性。与原始器件不同，原始器件在85°C、相对湿度10%的条件下储存720多小时后，其初始PCE急剧下降至16%，而TPP钝化的器件保留了其初始PCE的71%。因此，本研究提出了一种简便而出色的方法来获得高性能且热稳定的PSC。
