Highly Efficient Wide Bandgap Perovskite Solar Cells With Tunneling Junction by Self-Assembled 2D Dielectric Layer

Minwoo Lee; Jihoo Lim; Eunyoung Choi; Arman Mahboubi Soufiani; Seungmin Lee; Fa-Jun Ma; Sean Lim; Jan Seidel; Dong Han Seo; Ji-Sang Park; Wonjong Lee; Jongchul Lim; Richard Francis Webster; Jincheol Kim; Danyang Wang; Martin A Green; Dohyung Kim; Jun Hong Noh; Xiaojing Hao; Jae Sung Yun

doi:10.1002/adma.202402053

Highly Efficient Wide Bandgap Perovskite Solar Cells With Tunneling Junction by Self-Assembled 2D Dielectric Layer

Adv Mater. 2024 Oct;36(41):e2402053. doi: 10.1002/adma.202402053. Epub 2024 Aug 15.

Authors

Minwoo Lee^{1

2}, Jihoo Lim², Eunyoung Choi², Arman Mahboubi Soufiani³, Seungmin Lee⁴, Fa-Jun Ma², Sean Lim⁵, Jan Seidel¹, Dong Han Seo⁶, Ji-Sang Park⁷, Wonjong Lee⁸, Jongchul Lim⁸, Richard Francis Webster^{1

5}, Jincheol Kim^{9

10}, Danyang Wang¹, Martin A Green², Dohyung Kim¹¹, Jun Hong Noh^{4

12

13}, Xiaojing Hao², Jae Sung Yun^{2

14}

Affiliations

¹ School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
² Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
³ Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Division Solar Energy, 12489, Berlin, Germany.
⁴ School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, 02841, Republic of Korea.
⁵ Electron Microscope Unit, University of New South Wales, Sydney, NSW, 2052, Australia.
⁶ Energy Materials & Devices, Korea Institute of Energy Technology (KENTECH), Jeollanam-do, Naju, 58330, Republic of Korea.
⁷ SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
⁸ Department of Energy Science and Technology, Chungnam National University, Daejeon, 34134, Republic of Korea.
⁹ New & Renewable Research Center Korea, Electronics Technology Institute, Seong-Nam, 13509, Republic of Korea.
¹⁰ School of Engineering, Macquarie University Sustainable Energy Research Centre, Macquarie University, Sydney, NSW, 2109, Australia.
¹¹ Department of Advanced Materials Engineering, Chungbuk National University, Cheongju, 28644, South Korea.
¹² KU-KIST Green School Graduate School of Energy and Environment, Korea University, Seoul, 02841, Republic of Korea.
¹³ Department of Integrative Energy Engineering, Korea University, Seoul, 02841, Republic of Korea.
¹⁴ School of Computer Science and Electronic Engineering, Advanced Technology Institute (ATI), University of Surrey, Guildford, Surrey, GU2 7XH, UK.

PMID: 39148282
DOI: 10.1002/adma.202402053

Abstract

Reducing non-radiative recombination and addressing band alignment mismatches at interfaces remain major challenges in achieving high-performance wide-bandgap perovskite solar cells. This study proposes the self-organization of a thin two-dimensional (2D) perovskite BA₂PbBr₄ layer beneath a wide-bandgap three-dimensional (3D) perovskite Cs_0.17FA_0.83Pb(I_0.6Br_0.4)₃, forming a 2D/3D bilayer structure on a tin oxide (SnO₂) layer. This process is driven by interactions between the oxygen vacancies on the SnO₂ surface and hydrogen atoms of the n-butylammonium cation, aiding the self-assembly of the BA₂PbBr₄ 2D layer. The 2D perovskite acts as a tunneling layer between SnO₂ and the 3D perovskite, neutralizing the energy level mismatch and reducing non-radiative recombination. This results in high power conversion efficiencies of 21.54% and 19.16% for wide-bandgap perovskite solar cells with bandgaps of 1.7 and 1.8 eV, with open-circuit voltages over 1.3 V under 1-Sun illumination. Furthermore, an impressive efficiency of over 43% is achieved under indoor conditions, specifically under 200 lux white light-emitting diode light, yielding an output voltage exceeding 1 V. The device also demonstrates enhanced stability, lasting up to 1,200 hours.

Keywords: 2D perovskite; indoor perovskite solar cells; tunneling effect; wide bandgap.

Abstract

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