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Simultaneously boost diffusion length and stability of perovskite for high performance solar cells
Chao Liang1; Dandan Zhao1; Pengwei Li3; Bo Wu7; Hao Gu1; Jiacheng Zhang5; Teck Wee Goh7; Shi Chen3; Yonghua Chen6; Zhendong Sha4; Guosheng Shao5; Tze Chien Sum2; Guichuan Xing1
Source PublicationNano Energy

Organic-inorganic hybrid metal-halide perovskites, such as methylammonium lead iodide, have emerged as amazing semiconductors with immense potential in thin film photovoltaic owing to their impressive diffusion lengths. However, the instability of these perovskites in ambient air, due to the presence of hydrophilic and volatile organic cation, hinders their further commercialization. Although low-dimensional perovskite solar cells (PSCs) show better stability than conventional three-dimensional (3D) devices, the low power conversion efficiency (PCE) is delivered, due to the decline of carrier mobility and diffusion length. Here, a large organic cation, tert-butylammonium (t-BA), is incorporated into the 3D perovskite, which not only enhances the crystal stability, but also greatly reduces the trap density and improves the mobility of the perovskite film, leading to ∼1.8 μm electron and hole diffusion lengths. High-performance PSCs based on t-BA [Cs (FA MA ) ] Pb(I Br ) with champion PCEs of 20.62% (19.8% ± 0.4%) for 0.04 cm and 14.54% for 20.8 cm are demonstrated. More importantly, with humidity of 45–55%, the solar cells could sustain 80% of their “post burn-in” PCE after continuous working under light (AM1.5G, 100 mW cm ) in air for 1174 h. This lifetime is 63% longer than that (718 h) of the control Cs (FA MA ) Pb(I Br ) PSCs.

KeywordDiffusion Length High Performance Perovskite Solar Cells Stability
URLView the original
Indexed BySCIE
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000463032200080
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorZhendong Sha; Tze Chien Sum; Guichuan Xing
Affiliation1.Joint Key Laboratory of the Ministry of Education,Institute of Applied PhysicsandMaterialsEngineering,UniversityofMacau,AvenidadaUniversidade,Taipa,Macau999078,PRChina
2.Division of Physics and Applied Physics,School of Physical and MathematicalSciences,NanyangTechnologicalUniversity,21NanyangLink,Singapore637371,Singapore
4.State Key Laboratory for Strengthand Vibration of MechanicalStructures,SchoolofAerospaceEngineering,Xi'anJiaotongUniversity,Xi'an710049,PRChina
5.State Centre for International Cooperationon Designer Low-Carbonand EnvironmentalMaterial(SCICDLCEM),SchoolofMaterialsScienceandEngineering,ZhengzhouUniversity,Zhengzhou450001,PRChina
6.Key Laboratory of Flexible Electronics(KLOFE)&Institution of Advanced Materials(IAM),JiangsuNationalSynergeticInnovationCentreforAdvancedMaterials(SICAM),NanjingTechUniversity(NanjingTech),Nanjing211816,Jiangsu,PRChina
7.Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics,SouthChinaNormalUniversity,Guangzhou,GuangdongProvince,510006,PRChina
Recommended Citation
GB/T 7714
Chao Liang,Dandan Zhao,Pengwei Li,et al. Simultaneously boost diffusion length and stability of perovskite for high performance solar cells[J]. Nano Energy,2019,59:721-729.
APA Chao Liang,Dandan Zhao,Pengwei Li,Bo Wu,Hao Gu,Jiacheng Zhang,Teck Wee Goh,Shi Chen,Yonghua Chen,Zhendong Sha,Guosheng Shao,Tze Chien Sum,&Guichuan Xing.(2019).Simultaneously boost diffusion length and stability of perovskite for high performance solar cells.Nano Energy,59,721-729.
MLA Chao Liang,et al."Simultaneously boost diffusion length and stability of perovskite for high performance solar cells".Nano Energy 59(2019):721-729.
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