Facile and Stable Fluorene Based Organic Hole Transporting Materials for Efficient Perovskite Solar Cells

다국어 초록 (Multilingual Abstract)

Although the small molecule hole-transporting materials (HTMs) pop up with an efficiency of over 25%, long-term stability still needs to be improved for the commercialization of perovskite solar cells. In the current work, we designed two fluorine-dithiophene (FDT)-based small molecule HTMs (F2DT and FDT-DMP), and comparative studies of HTMs were performed for stable donor-acceptor-donor (D-A-D) perovskite solar cells. Notably, the introduction of fluorene-terminated groups on FDT resulted in fine-tuned energy levels and better thermal stability with a high glass transition temperature (T g~157℃), which follow-on enhanced perovskite device performance of F2DT. The hydrophobic nature of the F2DT compound truly favored the formation of uniform and dense perovskite films that further improved the stability of the devices. The comparison studies revealed that F2DT displayed higher power conversion efficiency (PCE) of 18% than FDT-DMP (PCE of 12.3%). The resultant F2DT device displays better stability than the device with FDT-DMP, maintaining almost 80% of its initial performance for more than 300 h.

참고문헌 (Reference)

1 Z. Xiao, 11 : 108-, 2017

2 V. M. Arivunithi, 8 : 1801637-, 2018

3 M. D.McGehee, 13 : 845-, 2014

4 Y. Chen, 577 : 209-, 2020

5 J. J. Yoo, 590 : 587-, 2021

6 M. Jeong, 16 : 119-, 2022

7 M. A. Green, 28 : 3-, 2020

8 N. J. Jeon, 3 : 682-, 2018

9 M. L. Petrus, 8 : 1801605-, 2018

10 M. Jeong, 369 : 1615-, 2020

11 R. Singh, 14 : 175-, 2019

12 X. Yin, 13 : 4057-, 2020

13 G. You, 12 : 2102697-, 2022

14 N. Cai, 60 : 20437-, 2021

15 N. Yaghoobi Nia, 9 : 5061-, 2021

16 N. Y. Nia, 10 : 3854-, 2017

17 G. Ren, 9 : 4589-, 2021

18 M. Ulfa, 6 : 13350-, 2018

19 M. Kim, 5 : 659-, 2021

20 S. D. Stranks, 342 : 1243982-, 2013

21 L. Hajikhanmirzaei, 8 : 6221-, 2020

22 G. Xing, 7 : 1243167-, 2013

23 M.-H. Li, 51 : 15518-, 2015

24 N.-G. Park, 1 : 16152-, 2016

25 N. J. Jeon, 13 : 897-, 2014

26 N. J. Jeon, 517 : 476-, 2015

27 M. Saliba, 1 : 15017-, 2016

28 N. J. Jeon, 3 : 682-, 2018

29 J. Wang, 2100967-, 2021

30 R. Jiang, 21 : 1866-, 2020

31 B. Xu, 2 : 676-, 2017

32 V. M. Arivunithi, 88 : 105987-, 2021

33 R. D. Gayathri, 14 : 10616-, 2022

34 P. J. S. Rana, 123 : 8560-, 2019

35 N. H. Hemasiri, 12 : 9395-, 2020

36 T. Gokulnath, 14 : 11211-, 2022

37 H. Cho, 350 : 1222-, 2015