Journal ArticleDOI
Carrier Diffusion Lengths of over 500 nm in Lead-Free Perovskite CH3NH3SnI3 Films
Lin Ma,Feng Hao,Constantinos C. Stoumpos,Brian T. Phelan,Michael R. Wasielewski,Mercouri G. Kanatzidis +5 more
Reads0
Chats0
TLDR
The results suggest that the photophysics of CH3NH3SnI3 perovskite are as favorable as those of CH2NH3PbI3, demonstrating that it is a promising nontoxic lead-free replacement for lead iodide perovSKite-based solar cells.Abstract:
The dynamics of photoexcited lead-free perovskite films, CH3NH3SnI3, were studied using broadband transient absorption and time-resolved fluorescence spectroscopy. Similar to its lead analogue CH3NH3PbI3, we show that free carrier (electrons and holes) recombination is also the dominant relaxation pathway in CH3NH3SnI3 films. The slow hot carrier relaxation time is 0.5 ps. Long carrier diffusion lengths for electrons (279 ± 88 nm) and holes (193 ± 46 nm) were obtained from fluorescence quenching measurements. We also show that SnF2 doping in the CH3NH3SnI3 film effectively increases the fluorescence lifetime up to 10 times and gives diffusion lengths exceeding 500 nm. These results suggest that the photophysics of CH3NH3SnI3 perovskite are as favorable as those of CH3NH3PbI3, demonstrating that it is a promising nontoxic lead-free replacement for lead iodide perovskite-based solar cells.read more
Citations
More filters
Journal ArticleDOI
Halide Perovskite Photovoltaics: Background, Status, and Future Prospects
TL;DR: The fundamentals, recent research progress, present status, and views on future prospects of perovskite-based photovoltaics, with discussions focused on strategies to improve both intrinsic and extrinsic (environmental) stabilities of high-efficiency devices are described.
Journal ArticleDOI
Carrier lifetimes of >1 μs in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells
Jinhui Tong,Jinhui Tong,Zhaoning Song,Dong Hoe Kim,Xihan Chen,Cong Chen,Axel F. Palmstrom,Paul F. Ndione,Matthew O. Reese,Sean P. Dunfield,Sean P. Dunfield,Obadiah G. Reid,Obadiah G. Reid,Jun Liu,Fei Zhang,Steven P. Harvey,Zhen Li,Steven T. Christensen,Glenn Teeter,Dewei Zhao,Mowafak Al-Jassim,Maikel F.A.M. van Hest,Matthew C. Beard,Sean E. Shaheen,Joseph J. Berry,Yanfa Yan,Kai Zhu +26 more
TL;DR: The addition of guanidinium thiocyanate (GuaSCN) resulted in marked improvements in the structural and optoelectronic properties of Sn-Pb mixed, low-band gap perovskite films, enabling the demonstration of >20% efficient low–band gap PSCs.
Journal ArticleDOI
Monolithic all-perovskite tandem solar cells with 24.8% efficiency exploiting comproportionation to suppress Sn( ii ) oxidation in precursor ink
Renxing Lin,Ke Xiao,Zhengyuan Qin,Qiaolei Han,Chunfeng Zhang,Mingyang Wei,Makhsud I. Saidaminov,Yuan Gao,Jun Xu,Min Xiao,Aidong Li,Jia Zhu,Edward H. Sargent,Hairen Tan +13 more
TL;DR: Lin et al. as discussed by the authors used metallic tin to prevent oxidation in mixed Pb-Sn narrowbandgap perovskites to reduce the Sn4+ (an oxidation product of Sn2+) to Sn2+ via a comproportionation reaction.
Journal ArticleDOI
A critical review on tin halide perovskite solar cells
TL;DR: In this paper, the authors present results on single junction solar cells, utilizing CsSnI3−xBrx, CH3NH3snI3+XBrx or NH2CHNH2SnI 3−xBRx perovskites as absorbers, as well as a mixture of Sn2+/Pb2+ being adopted as the metal binary cation, reducing the bandgap to 1.2-1.4 eV.
Journal ArticleDOI
All-perovskite tandem solar cells with 24.2% certified efficiency and area over 1 cm2 using surface-anchoring zwitterionic antioxidant
Ke Xiao,Renxing Lin,Qiaolei Han,Yi Hou,Zhenyuan Qin,Hieu T. Nguyen,Jin Wen,Mingyang Wei,Vishal Yeddu,Makhsud I. Saidaminov,Yuan Gao,Xin Luo,Y.N. Wang,Han Gao,Chunfeng Zhang,Jun Xu,Jia Zhu,Edward H. Sargent,Hairen Tan +18 more
TL;DR: Xiao et al. as mentioned in this paper used strongly reductive surface-anchoring zwitterionic molecules to suppress Sn2+ oxidation and passivate defects at the grain surfaces in mixed lead-tin perovskite films, enabling an efficiency of 21.7% (certified 20.7%).
References
More filters
Journal ArticleDOI
Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells
TL;DR: Two organolead halide perovskite nanocrystals were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells, which exhibit strong band-gap absorptions as semiconductors.
Journal ArticleDOI
Electron-hole diffusion lengths exceeding 1 micrometer in an organometal trihalide perovskite absorber.
Samuel D. Stranks,Giles E. Eperon,Giulia Grancini,Christopher Menelaou,Marcelo J. P. Alcocer,Tomas Leijtens,Laura M. Herz,Annamaria Petrozza,Henry J. Snaith +8 more
TL;DR: In this article, transient absorption and photoluminescence-quenching measurements were performed to determine the electron-hole diffusion lengths, diffusion constants, and lifetimes in mixed halide and triiodide perovskite absorbers.
Journal Article
Electron-Hole Diffusion Lengths Exceeding 1 Micrometer in an Organometal Trihalide Perovskite Absorber
Samuel D. Stranks,Giles E. Eperon,Giulia Grancini,Christopher Menelaou,Marcelo J. P. Alcocer,Tomas Leijtens,Laura M. Herz,Annamaria Petrozza,Henry J. Snaith +8 more
TL;DR: In this paper, transient absorption and photoluminescence-quenching measurements were performed to determine the electron-hole diffusion lengths, diffusion constants, and lifetimes in mixed halide and triiodide perovskite absorbers.
Journal ArticleDOI
Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3
Guichuan Xing,Nripan Mathews,Shuangyong Sun,Swee Sien Lim,Yeng Ming Lam,Michael Grätzel,Michael Grätzel,Subodh Mhaisalkar,Tze Chien Sum +8 more
TL;DR: Two studies show, using a variety of time-resolved absorption and emission spectroscopic techniques, that perovskite materials manifest relatively long diffusion paths for charge carriers energized by light absorption, highlighting effective carrier diffusion as a fruitful parameter for further optimization.
Journal ArticleDOI
The emergence of perovskite solar cells
TL;DR: In this article, a review describes the rapid progress that has been made in hybrid organic-inorganic perovskite solar cells and their applications in the photovoltaic sector.