Ultrathin TiO2-coated SiO2 nanoparticles as light scattering centers

for quantum dot-sensitized solar cells

Muhammad Abdul Basit,1,3 Muhammad Awais Abbas,2 Hafiz Muhammad Naeem,1 Ijaz Ali,3

Eunyong Jang,3 Jin Ho Bang2,4,5,* and Tae Joo Park3,6*

1Department of Materials Science and Engineering, Institute of Space Technology, Islamabad 44000,

Pakistan

2Nanosensor Research Institute, Hanyang University, Ansan 15588, Korea

3Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Korea

4Department of Chemical and Molecular Engineering, Hanyang University, Ansan 15588, Korea

5Department of Bionano Technology, Hanyang University, Ansan 15588, Korea

6Department of Advanced Materials Engineering, Hanyang University, Ansan 15588, Republic of Korea

*Corresponding authors: tjp@hanyang.ac.kr;jbang@hanyang.ac.krKeywords: QDSSCs; atomic layer deposition; core-shell; light scattering; SiO2

Figure S1. EDS-specification of PbS-QDs sensitized (a) SiO2 and (b) ST-NPs

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Figure S2. XPS full spectra for SiO2 NPs and ST-NPs

Fig. S3 Profilometer images taken for comparing the thickness of mesoporous TiO2 photoanodes (a) without and (b) with ST-NPs

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Figure S4. J-V characteristics of QDSSCs without (in black) and with SiO2 NPs (in red)

Figure S5. Equivalent circuit diagram for the fitting of EIS data for QDSSCs

Figure S6. Equivalent band (VECB) condition for QDSSCs without and with ST-NPs in TiO2 photoanode

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