Tin Oxide (SnO2) Nanowire Arrays toward Highly-Efficient 1-Dimensional Perovskite Solar Cells.

Gill Sang Han^a, Hyun Suk Chung^b, So Yeon Park^c, Nam-Gyu Park^d, Hyun Suk Jung^e

^aSungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of

^bSungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of

^cSungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of

^dSungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of

^eSungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of

International Conference on Hybrid and Organic Photovoltaics
Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)

Ecublens, Switzerland, 2014 May 11th - 14th

Organizers: Michael Graetzel and Mohammad Nazeeruddin

Oral, Gill Sang Han, presentation 102
Publication date: 1st March 2014

Pervoskite solar cells have generated a strong interest that it has higher absorption coefficient and long absorption wavelength.¹ Pervoskite solar cells have achieved energy conversion efficiency of 15 % using a CH₃NH₃PbI₃ absorber with mesoporous metal oxide nanoparticles(TiO₂).² CH₃NH₃PbI₃ solar cells should contain mesoporous metal oxide nanoparticle layers to collect the photogenerated electrons in Perovskite layers due to their relatively short electron diffusion length, i.e. approximately 90 nm.³ 1-D nanostructured metal oxides have been under active research because of their distinguished charge collection property.⁴

In the present study, we fabricated 1-D nanostructured tin oxide (SnO₂) nanowirearrays by using avapor transport method(VTM).⁵Structural analysis including high-resolution transmission electron microscopy (HRTEM) and X-Ray diffraction (XRD) revealedthat the SnO₂ NWs possessed single crystalline nature and preferred orientation. Compared with the TiO₂ particle based Perovskite solar cells, the SnO₂ NW based solar cells exhibited superior transport properties evidenced by transient decay studies. As a result, the Perovskite solar cell based on SnO₂ NW arrays showed the powder conversion efficiency of more than 12 %, which demonstrates that the SnO₂ NW arrays are one of promising charge-collecting nanomaterials in Perovskites.

[1] Hui-Seon Kim, Chang-Ryul Lee, Jeong-Hyeok Im, Ki-Beom Lee, Thomas Moehl, Arianna Marchioro, Soo-Jin Moon, Robin Humphry-Baker, Jun-Ho Yum, Jacques E. Moser, Michael Gr�tzel & Nam-Gyu Park, Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9%, Scientific reports 2012, 2, 591 [2] Julian Burschka, Norman Pellet, Soo-Jin Moon, Robin Humphry-Baker, Peng Gao, Mohammad K. Nazeeruddin& Michael Gr�tzel,Sequential deposition as a route to high-performance perovskite-sensitized solar cells, Nature 2013, 499 [3] Guichuan Xing, Nripan Mathews, Shuangyong Sun, Swee Sien Lim, Yeng Ming Lam,Michael Gr�tzel, Subodh Mhaisalkar, Tze Chien Sum, Long-Range Balanced Electron and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3, Science 2013, 342 [4] Hui-Seon Kim, Jin-Wook Lee, Natalia Yantara, Pablo P. Boix, Sneha A. Kulkarni, Subodh Mhaisalkar, Michael Grätzel and Nam-Gyu Park, High Efficiency Solid-State Sensitized Solar Cell-Based on Submicrometer Rutile TiO2 Nanorod and CH3NH3PbI3 Perovskite Sensitizer, Nano letters 2013, 13, 6 [5] Jun Hong Noh, Hyun Soo Han, Sangwook Lee, Jin Young Kim, Kug Sun Hong, Gil-Sang Han, Hyunjung Shin, Hyun Suk Jung, Nanowire-Based Three-Dimensional Transparent Conducting Oxide Electrodes for Extremely Fast Charge Collection, Advanced Energy Materials 2011, 1, 5

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