Over 21% Efficiency Stable 2D Perovskite Solar Cells

Shao，Ming1; Bie，Tong1; Yang，Lvpeng1; Gao，Yerun1; Jin，Xing1; He，Feng2; Zheng，Nan3; Yu，Yu1; Zhang，Xinliang1

2021

10.1002/adma.202107211

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Owing to their insufficient light absorption and charge transport, 2D Ruddlesden–Popper (RP) perovskites show relatively low efficiency. In this work, methylammonium (MA), formamidinum (FA), and FA/MA mixed 2D perovskite solar cells (PSCs) are fabricated. Incorporating FA cations extends the absorption range and enhances the light absorption. Optical spectroscopy shows that FA cations substantially increase the portion of 3D-like phase to 2D phases, and X-ray diffraction (XRD) studies reveal that FA-based 2D perovskite possesses an oblique crystal orientation. Nevertheless, the ultrafast interphase charge transfer results in an extremely long carrier-diffusion length (≈1.98 µm). Also, chloride additives effectively suppress the yellow δ-phase formation of pure FA-based 2D PSCs. As a result, both FA/MA mixed and pure FA-based 2D PSCs exhibit a greatly enhanced power conversion efficiency (PCE) over 20%. Specifically, the pure FA-based 2D PSCs achieve a record PCE of 21.07% (certified at 20%), which is the highest efficiency for low-dimensional PSCs (n ≤ 10) reported to date. Importantly, the FA-based 2D PSCs retain 97% of their initial efficiency at 85 °C persistent heating after 1500 h. The results unambiguously demonstrate that pure-FA-based 2D PSCs are promising for achieving comparable efficiency to 3D perovskites, along with a better device stability.

interphase charge transfer low-dimensional materials perovskite solar cells phase distribution Ruddlesden–Popper perovskites

SCI ; EI

英语

NI期刊 ; ESI高被引 ; NI论文 ; ESI热点

其他

National Natural Science Foundation of China["U1601651",62174062] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Shenzhen Sci-Tech Fund[KYTDPT20181011104007]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000710517200001

WILEY-V C H VERLAG GMBH

20214311079760

Additives ; Charge transfer ; Chlorine compounds ; Crystal orientation ; Efficiency ; Light absorption ; Perovskite solar cells ; Positive ions

Minerals:482.2 ; Solar Cells:702.3 ; Light/Optics:741.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Production Engineering:913.1 ; Crystal Lattice:933.1.1

MATERIALS SCIENCE

2-s2.0-85117842913

Scopus

1.Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,430074,China
2.Shenzhen Grubbs Institute,Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis,Southern University of Science and Technology,Shenzhen,518055,China
3.State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou,510640,China

Shao，Ming,Bie，Tong,Yang，Lvpeng,et al. Over 21% Efficiency Stable 2D Perovskite Solar Cells[J]. ADVANCED MATERIALS,2021,34.

Shao，Ming.,Bie，Tong.,Yang，Lvpeng.,Gao，Yerun.,Jin，Xing.,...&Zhang，Xinliang.(2021).Over 21% Efficiency Stable 2D Perovskite Solar Cells.ADVANCED MATERIALS,34.

Shao，Ming,et al."Over 21% Efficiency Stable 2D Perovskite Solar Cells".ADVANCED MATERIALS 34(2021).