Supporting InformationNovel Hole Transporting Material Based on Tetrathiafulvalene Derivative: A Step

Towards Dopant Free, Ambient Stable and Efficient Perovskite Solar Cells

Haseeb Ashraf Malika, Longfei Mab, Junsheng Luoa, Jianxing Xiaa, Zhongquan Wana,

Muhammad Kamran Khanc, Xiangfeng Shao*b, Chunyang Jia,a

a State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and

Engineering, University of Electronic Science and Technology of China, Chengdu 610054, P.R China.

b State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China.

c Department of Electronics, University of Peshawar, Pakistan

Fig. S1. (a) Optimized structure (b) HOMO (c) LUMO of Spiro-OMeTAD.

Corresponding author. Email: cyjia@uestc.edu.cn (C. Y. Jia) and shaoxf@lzu.edu.cn (X. F. Shao)

Fig. S2. UPS spectra of TTF based HTM (a) onset region (b) Cut-Off region.

Fig. S3. J-V curves of PSC based on 15 mg/ml, 17 mg/ml, 19 mg/ml and 21 mg/ml

HTM concentrations.

Table. S1

Concentration (mg/ml)

Jsc

(mA/cm2) Voc

(V) FF Efficiency

(%)

15 19.56 1.01 0.70 14.03

17 19.87 1.02 0.72 14.78

19 20.03 1.02 0.74 15.38

21 19.40 1.0 0.67 13.24

ITO

PEDOT:PSS

TTF Active layer

MoO3

Au

Fig. S4. Schematic structure of hole only device employed for SCLC analysis.

Fig. S5. Time vs PCE decay plot of TTF and Spiro-OMeTAD based PSCs.

(i) (ii) (iii) (iv)

(a)

(c) (b) (d)

Fig. S6. (a) Real images of (i) fresh (ii) 15 days (iii) 30 days (iv) 45 days aged FTO/C-

TiO2/M-TiO2/Perovskite/TTF based device (b) Front image of fresh and 45 days aged TTF

based PSCs (c) Back images of fresh and 45 days aged TTF based PSCs (d) FTO/C-

TiO2/M-TiO2/Perovskite/TTF based device without top Au electrode.

(d)