Characteristics of Perovskite Solar Cells with ZnO Coated on Mesoporous TiO2 as an Electron Transfer Layer

Joonsub Ahn; Jaegwan Song; Eunmi Han

Korean Journal of Materials Research, Vol.32, No.2, 94-97, February, 2022

DOI10.3740/MRSK.2022.32.2.94 Export Citation

Characteristics of Perovskite Solar Cells with ZnO Coated on Mesoporous TiO2 as an Electron Transfer Layer

Joonsub Ahn, Jaegwan Song¹, and Eunmi Han^{2, †}

Department of Advanced Chemicals & Engineering, Chonnam National University, Gwangju, Republic of Korea
¹Research&Development Department, PMC Tech, Steel 2408, GwangYang, Republic of Korea
²School of Chemical Engineering, Chonnam National University, Gwangju, Republic of Korea

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We fabricated 3 types of ETL, mp TiO2, ZnO, and ZnO coated on mp TiO2(ZMT) to compare the photoelectric conversion efficiency (PCE) and fill factor (FF) of Perovskite solar cells. The structure of the cells was FTO/ETL/Perovskite (CH3NH3PbI3)/spiro-MeOTAD/Ag. SEM morphology assessment of the ETLs showed that mp TiO2 was porous, ZnO was flat, and the ZMT porous surface was filled with a thin layer. Via XRD measurements, the crystal structures of mp TiO2 and ZnO ETL were found to be anatase and wurtzite, respectively. The XPS patterns showing energy bonding of mp TiO2, ZnO, and ZMT O 1s confirmed these materials to be metal oxides such as ETL. The electrical characteristics of the Perovskite solar cells were measured using a solar simulator. Perovskite solar cells with ZMT ETL showed showed PCE of 10.29 % than that of conventional mp TiO2 ETL devices. This was considered a result of preventing Perovskite from seeping into the ETL and preventing recombination of electrons and holes.

Keywords:electron transfer layer;photoelectric conversion efficiency;perovskite solar cell

[References]

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[1] Jung EH, Jeon NJ, Park EY, Moon CS, Shin TJ, Yang TY, Noh JH, Seo JW, Nature, 567, 511 (2019)

[2] Green MA, Dunlop ED, Levi DH, Ebinger JH, Yosita M, Ho-Baillie AWY, Prog. Photovolt. Res. Appl., 27, 565 (2019)

[3] Im JH, Lee CR, Lee JW, Park SW, Park NG, Nanoscale, 3, 4088 (2011)

[4] Kim HS, Lee CR, Im JH, Lee KB, Moehl T, Marchioro A, Moon SJ, Baker RH, Yum JH, Moser JE, Gratzel M, Park NG, Sci. Rep., 2, 591 (2012)

[5] Chen H, Pan X, Liu W, Cai M, Kou D, Huo Z, Fang X, Dai S, Chem. Commun., 49, 7277 (2013)

[6] Kim HS, Lee JW, Yantara N, Boix PP, Kulkarni SA, Mhaisalkar S, Gratzel M, Park NG, Nano Lett., 13, 2412 (2013)

[7] Heo JH, Im SH, Noh JH, Mandal TN, Lim CS, Chang JA, Lee YH, Kim HJ, Sarkar A, Nazeeruddin MK, Gratzel M, Seok SI, Nat. Photonics, 7, 486 (2013)

[8] Kumar MH, Yantara N, Dharani S, Graetzel M, Mhaisalkar S, Boix PP, Mathews N, Chem. Commun., 49, 11089 (2013)

[9] Son DY, Im JH, Kim HS, Park NG, J. Phys. Chem. C, 118, 16567 (2014)

[10] Liu D, Kelly TL, Nat. Photonics, 8, 133 (2014)

[11] Lee MM, Teuscher J, Miyasaka T, Murakami TN, Snaith HJ, Science, 338, 643 (2012)

[12] Edri E, Kirmayer S, Cahen D, Hodes G, J. Phys. Chem. Lett., 4, 897 (2013)

[13] Edri E, Kirmayer S, Kulbak M, Hodes G, Cahen D, J. Phys. Chem. Lett., 5, 429 (2014)

[14] Cai B, Xing Y, Yang Z, Zhang WH, Qiu J, Energy Environ. Sci., 6, 1480 (2013)

[15] Ryu S, Noh JH, Jeon NJ, Kim YC, Yang WS, Seo J, Seok SI, Energy Environ. Sci., 7, 2614 (2014)

[16] Moulder JF, Stickle WF, Sobol PE, Bomben KD, Handbook of X-ray Photoelectron Spectroscopy, p.45, 73, 89, Eds. Chastain J, Perkin-Elmer Corporation, Minnesota, USA (1992).