Constructing Monolithic Perovskite/Organic Tandem Solar Cell with Efficiency of 22.0% via Reduced Open-Circuit Voltage Loss and Broadened Absorption Spectra

Shucheng Qin; Chenxing Lu; Zhenrong Jia; Yiyang Wang; Siguang Li; Wenbin Lai; Pengju Shi; Rui Wang; Can Zhu; Jiaqi Du; Jinyuan Zhang; Lei Meng; Yongfang Li

doi:10.1002/adma.202108829

Constructing Monolithic Perovskite/Organic Tandem Solar Cell with Efficiency of 22.0% via Reduced Open-Circuit Voltage Loss and Broadened Absorption Spectra

Adv Mater. 2022 Mar;34(11):e2108829. doi: 10.1002/adma.202108829. Epub 2022 Feb 5.

Authors

Shucheng Qin^{1

2}, Chenxing Lu^{1

2}, Zhenrong Jia^{1

2}, Yiyang Wang^{1

2

3}, Siguang Li^{1

2}, Wenbin Lai^{1

2}, Pengju Shi³, Rui Wang³, Can Zhu^{1

2}, Jiaqi Du^{1

2}, Jinyuan Zhang^{1

2}, Lei Meng^{1

2}, Yongfang Li^{1

2

4}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
² School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100049, China.
³ School of Engineering, Westlake University, Hangzhou, 310024, China.
⁴ Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.

PMID: 35048434
DOI: 10.1002/adma.202108829

Abstract

Combining the high stability under UV light of the wide bandgap (WBG) perovskite solar cells (pero-SCs) and the broad near-infrared absorption spectra of the narrow bandgap (NBG) organic solar cells (OSCs), the perovskite/organic tandem solar cells (TSCs) with the WBG pero-SC as front cell and the NBG OSC as rear cell have attracted attention . However, the photovoltaic performance of the perovskite/organic TSCs needs to be further improved. Herein, nonradiative charge recombination loss is reduced through bulk defect passivation in the WBG pero-SC front subcell and broadening the range of absorption spectra of the NBG OSC rear cell. For the WBG pero-SCs, an organic cation chloro-formamidinium is introduced into FA_0.6 MA_0.4 Pb(I_0.6 Br_0.4 )₃ to passivate the bulk defects in the perovskite film and the WBG pero-SC displays high open-circuit voltage of 1.25 V and high fill factor of 83.0%. For the NBG OSCs, a new infrared-absorbing organic small molecule acceptor BTPV-4Cl-eC9 is designed and synthesized. Then, a monolithic perovskite/organic TSC is fabricated with the WBG pero-SC as the front cell and the NBG OSC as the rear cell, and the TSC demonstrates high power conversion efficiency up to 22.0%. The results indicate that the perovskite/organic TSC is promising for future commercialization.

Keywords: narrow bandgap organic solar cells; open-circuit voltage loss; perovskite/organic tandem solar cells; wide bandgap perovskite solar cells.

Abstract

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