J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (9): 1474-1480.DOI: 10.1016/j.jmst.2018.03.005
• Orginal Article • Previous Articles Next Articles
Mustafa Haiderab,1, Chao Zhena,1, Tingting Wuac, Gang Liuac*(), Hui-Ming Chengade
Received:
2018-02-04
Revised:
2018-03-02
Accepted:
2018-03-03
Online:
2018-09-20
Published:
2018-09-25
Contact:
Liu Gang
Mustafa Haider, Chao Zhen, Tingting Wu, Gang Liu, Hui-Ming Cheng. Boosting efficiency and stability of perovskite solar cells with nickel phthalocyanine as a low-cost hole transporting layer material[J]. J. Mater. Sci. Technol., 2018, 34(9): 1474-1480.
Fig. 2. (a) XRD patterns of FTO/TiO2 (black line), FTO/TiO2/MAPbI3 (red line) and FTO/TiO2/MAPbI3/NiPc (blue line). (b, c) Top-view SEM images of FTO/TiO2/MAPbI3 and FTO/TiO2/MAPbI3/NiPc. (d) UV-vis absorption spectra of FTO/TiO2/NiPc (black dot), FTO/TiO2/MAPbI3 (red line) and FTO/TiO2/MAPbI3/NiPc (blue line).
Fig. 3. (a) Current density-voltage (J-V) curves of the PSCs with different thicknesses of NiPc. (b)J-V curves of devices with NiPc and CuPc as HTM. (c) Efficiency histogram of devices based on NiPc (and CuPc) as HTM for 30 cells. (d) Incident photo-to-current conversion efficiency (IPCE) spectra of the best-performing cell using the NiPc HTM. (The J-V curves were recorded under reverse scan with scan rate of 200 mV s-1).
Fig. 4. (a) Steady-state photoluminescence (PL) spectra of MAPbI3 on quartz (Quartz/MAPbI3) and MAPbI3 sandwiched between quartz and NiPc film (Quartz/MAPbI3/NiPc). (b) Time-resolved photoluminescence (TRPL) decay curves of Quartz/MAPbI3 and Quartz/MAPbI3/NiPc taken at the peak emission wavelength of 775 nm. Excitation is performed with a pulsed laser source at 471 nm with an excitation power density of 1 nJ cm-2 impinged on the quartz substrate side. Laser pulse length is 4 ns. Solid lines represent the fitting curve resulting from exponential fitting in the form of y = A1 exp(x/t1) + A2 exp(x/t2).
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