AI Article Synopsis
- A new domino sequence was developed using phosphinoauration and gold-catalyzed cyclization to create π-extended phosphoniumfluorenes from simple phosphadiynes.
- Kinetic measurements and trapping intermediates supported the proposed mechanism for gold-catalyzed hydroarylation.
- The phosphoniumfluorene was tested as a hole-blocking layer in perovskite solar cells, leading to a significant efficiency increase from 10.7% to 14.2%.
Article Abstract
A domino sequence, involving a phosphinoauration and a gold-catalyzed 6-endo-dig cyclization step, was developed. Starting from modular and simple-to-prepare phosphadiynes, π-extended phosphoniumfluorenes were synthesized. The mechanistic proposal was supported by kinetic measurements and by the trapping of key intermediates. These led to important conclusions for the gold-catalyzed hydroarylation mechanism. Cyclic voltammetry (CV) and UV/Vis spectroscopy measurements indicated interesting properties for materials science. The phosphoniumfluorene structure was tested as a hole-blocking layer in perovskite solar cells of inverted architecture. Devices with the phosphoniumfluorene exhibited an efficiency of 14.2 %, which was much higher than that of devices without (10.7 %).
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| http://dx.doi.org/10.1002/chem.201800460 | DOI Listing |
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