The versatility of Pb(NO3)2 as a new precursor for organo-lead perovskite solar cells

Tzu Chien Wei^a, Tsung Yu Hsieh^a, Kuan Lin Wu^b, Tsutomu Miyasaka^b, Masashi Ikegami^b

^aDepartment of Chemical Engineering, National Tsing Hua University, Taiwan, No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan, HsinChu, 30013, Taiwan, Republic of China

^bGraduate School of Engineering, Toin University of Yokohama, Kurogane-cho 1614, Aoba-ku, Yokohama, 225-8503

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Oral, Tsung Yu Hsieh, presentation 244
Publication date: 5th February 2015

We propose a non-halide lead precursor, Pb(NO₃)₂, for preparing perovskite solar cells via sequential deposition. Pb(NO₃)₂ has high solubility in various kinds of polar solvents (DMF, etc.) and can be deposited as a thin film. CH₃NH₃PbI₃ layer was prepared by immersing Pb(NO₃)₂-coated substrate in CH₃NH₃I solution, followed by annealing of as-prepared film. X-ray diffraction (XRD) analysis shows the growth of CH₃NH₃PbI₃ with very weak peak at 2θ≅12.6°which is the diffraction of PbI₂ being usually found and uncontrollable by using PbI₂ as lead source. Chemical management of mixed-halide perovskite can be easily controlled by using a mixture of CH₃NH₃X (X= I, Br) solution and was investigated by UV-vis absorption. The Pb(NO₃)₂ based perovskite opens a new window for preparing CH₃NH₃PbBr₃ through sequential deposition which is often hindered because of the poor solubility of PbBr₂ in DMF. Finally, we demonstrate the power conversion efficiency of Pb(NO₃)₂ based CH₃NH₃PbI₃ solar cell higher than 10% and we believe that Pb(NO₃)₂ is another suitable candidate for the lead precursor in development of highly efficient perovskite solar cell.
J-V curves of Pb(NO3)2 based Ch3NH3PbI3 solar cell
J. Burschka, N. Pellet, S. J. Moon, R. Humphry-Baker, P. Gao, M. K. Nazeeruddin and M. Gratzel. Sequential deposition as a route to high-performance perovskite-sensitized solar cells. Nature, 2013, 499, 316-319

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