Carbazole-based hole-transport materials for efficient Perovskite solar cells. A computational study

Atir, Redouane; Idrissi, Abdennacer; Elfakir, Zouhair; Habsaoui, Amar; Touhami, M. Ebn; Bouzakraoui, Saïd

doi:10.1016/j.ijleo.2022.168793

Cited by 6 publications

(2 citation statements)

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“…The phenoxy group is not involved in the contribution of HOMO and LUMO, so the OH44 energy level can be foreseen similar to that of EH44. 33 We used thermogravimetric analysis and differential scanning calorimetry (TGA and DSC) to analyze the thermal stability (Figure 2a). The decomposition temperature of OH44 is 406.3 °C, which is slightly higher than that of EH44 of 394.2 °C.…”

Section: Resultsmentioning

confidence: 99%

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LiTFSI-Free Hole Transport Materials for Robust Perovskite Solar Cells and Modules with High Efficiencies

Zhu,

Lv,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Lithium bis(trifluoromethane) sulfonamide (LiTFSI) and oxygen-doped organic semiconductors have been frequently used to achieve record power conversion efficiencies of perovskite solar cells (PSCs). However, this conventional doping process is timeconsuming and leads to poor device stability due to the incorporation of Li ions. Herein, aiming to accelerate the doping process and remove the Li ions, we report an alternative p-doping process by mixing a new small-molecule organic semiconductor, N 2 ,N 2 ,N 7 ,N 7 -tetrakis (4methoxyphenyl)-9-(4-(octyloxy) phenyl)-9H carbazole-2,7-diamine (labeled OH44) and its preoxidized form OH44 + (TFSI − ). With this method, a champion efficiency of 21.8% has been achieved for smallarea PSCs, which is superior to the state-of-the-art EH44 and comparable with LiTFSI and oxygen-doped spiro-OMeTAD. Moreover, the stability of OH44-based PSCs is improved compared with those of EH44, maintaining more than 85% of its initial efficiency after aging in an ambient condition without encapsulation for 1000 h. In addition, we achieved efficiencies of 14.7 and 12.6% for the solar modules measured with a metal mask of 12.0 and 48.0 cm 2 , respectively, which demonstrated the scalability of this method.

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Section: Resultsmentioning

confidence: 99%

“…The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the OH44 molecule are distributed throughout the π–system. The phenoxy group is not involved in the contribution of HOMO and LUMO, so the OH44 energy level can be foreseen similar to that of EH44 …”

Section: Results and Discussionmentioning

confidence: 99%