Fluorene-based Organic Hole Transporting Material for Improved Stable Perovskite Solar Cell
발표자
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초록
내용
Hole transporting materials (HTMs) play a significant role in enhancing the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs), for their commercialization an effective design strategy is required. Herein, we have designed and synthesized a new class of HTM F2DT based on 2',7'-dibromospiro[cyclopenta[1,2-b:5,4-b’] dithiophene-4,9'-fluorene] and dimethyl-9H-fluoren-2-amine core, respectively. We have systematically investigated the thermal, photophysical, electrochemical properties and found that it has potential to utilize as an HTM perovskite solar cell (PSC) device applications. The new HTM F2DT was introduced for PSCs and fabricated with a device configuration of FTO/TiO2/Perovskite/HTM/Au. The F2DT based HTM device has shown significant device performance in solution-process with a power conversion efficiency (PCE) of over 16.0%. It clearly indicates that F2DT can replace regular Spiro-OMeTAD which is also expensive.