Journal ArticleDOI
Planar Heterojunction Perovskite Solar Cells via Vapor-Assisted Solution Process
Qi Chen,Huanping Zhou,Ziruo Hong,Song Luo,Hsin Sheng Duan,Hsin-Hua Wang,Yongsheng Liu,Gang Li,Yang Yang +8 more
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TLDR
A low-temperature vapor-assisted solution process is demonstrated to construct polycrystalline perovskite thin films with full surface coverage, small surface roughness, and grain size up to microscale, paving the way for high reproducibility of films and devices.Abstract:
Hybrid organic/inorganic perovskites (e.g., CH3NH3PbI3) as light absorbers are promising players in the field of third-generation photovoltaics. Here we demonstrate a low-temperature vapor-assisted solution process to construct polycrystalline perovskite thin films with full surface coverage, small surface roughness, and grain size up to microscale. Solar cells based on the as-prepared films achieve high power conversion efficiency of 12.1%, so far the highest efficiency based on CH3NH3PbI3 with the planar heterojunction configuration. This method provides a simple approach to perovskite film preparation and paves the way for high reproducibility of films and devices. The underlying kinetic and thermodynamic parameters regarding the perovskite film growth are discussed as well.read more
Citations
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Dual nature of the excited state in organic–inorganic lead halide perovskites
TL;DR: In this article, the authors investigated the nature of perovskite absorption features and optical properties and proposed a band structure composed of two distinct transitions that is consistent with the various spectral features and kinetic behavior of the CH3NH3PbI3 excited state.
Journal ArticleDOI
Device stability of perovskite solar cells – A review
TL;DR: A thorough overview of state of the art of stability of perovskite solar cells and important degradation issues involved in this technology are discussed in this paper. But the degradation mechanisms resulting from thermal and chemical instabilities, phase transformations, exposure to visible and UV light, moisture and oxygen and most importantly sealing issues are thoroughly analyzed.
Journal ArticleDOI
Controllable Grain Morphology of Perovskite Absorber Film by Molecular Self-Assembly toward Efficient Solar Cell Exceeding 17%.
TL;DR: The present study gives a reproductive and facile strategy toward high quality of perovskite thin films and efficient solar cells by controlling DMSO species in the complex-precursor system (CPS).
Journal ArticleDOI
Types of Solar Cells and Application
TL;DR: In this paper, the authors studied different types of solar cells and their applications and showed that nearly all photovoltaic energy conversion uses semiconductor materials in the form of a p-n junction.
Journal ArticleDOI
Regulating Surface Termination for Efficient Inverted Perovskite Solar Cells with Greater Than 23% Efficiency
Fengzhu Li,Xiang Deng,Feng Qi,Zhen Li,Danjun Liu,Dong Shen,Minchao Qin,Shengfan Wu,Francis Lin,Sei-Hum Jang,Jie Zhang,Xinhui Lu,Dangyuan Lei,Chun-Sing Lee,Zonglong Zhu,Alex K.-Y. Jen +15 more
TL;DR: A rationally designed bifunctional molecule, piperazinium iodide (PI), containing both R2NH and R2 NH2+ groups on the same six-membered ring, behaving both as an electron donor and an electron acceptor to react with different surface-terminating ends on perovskite films is reported.
References
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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
Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites
Michael M. Lee,Joël Teuscher,Tsutomu Miyasaka,Takurou N. Murakami,Takurou N. Murakami,Henry J. Snaith +5 more
TL;DR: A low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight is reported.
Journal ArticleDOI
Sequential deposition as a route to high-performance perovskite-sensitized solar cells
Julian Burschka,Norman Pellet,Norman Pellet,Soo-Jin Moon,Robin Humphry-Baker,Peng Gao,Mohammad Khaja Nazeeruddin,Michael Grätzel +7 more
TL;DR: A sequential deposition method for the formation of the perovskite pigment within the porous metal oxide film that greatly increases the reproducibility of their performance and allows the fabrication of solid-state mesoscopic solar cells with unprecedented power conversion efficiencies and high stability.
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 ArticleDOI
Efficient planar heterojunction perovskite solar cells by vapour deposition
TL;DR: It is shown that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.