Journal ArticleDOI
Lewis Base Passivation Mediates Charge Transfer at Perovskite Heterojunctions.
Robert J. E. Westbrook,Robert J. E. Westbrook,Thomas J. Macdonald,Weidong Xu,Luis Lanzetta,Jose Manuel Marin-Beloqui,Tracey M. Clarke,Saif A. Haque +7 more
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TLDR
In this article, a mixture of optical and X-ray photoelectron spectroscopy was used to show that chemical binding of charge transport layers to CH3NH3PbI3 defect sites is an integral part of the interfacial charge injection mechanism in both n-i p and p-i n architectures.Abstract:
Understanding interfacial charge transfer processes such as trap-mediated recombination and injection into charge transport layers (CTLs) is crucial for the improvement of perovskite solar cells. Herein, we reveal that the chemical binding of charge transport layers to CH3NH3PbI3 defect sites is an integral part of the interfacial charge injection mechanism in both n-i-p and p-i-n architectures. Specifically, we use a mixture of optical and X-ray photoelectron spectroscopy to show that binding interactions occur via Lewis base interactions between electron-donating moieties on hole transport layers and the CH3NH3PbI3 surface. We then correlate the extent of binding with an improvement in the yield and longer lifetime of injected holes with transient absorption spectroscopy. Our results show that passivation-mediated charge transfer has been occurring undetected in some of the most common perovskite configurations and elucidate a key design rule for the chemical structure of next-generation CTLs.read more
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Lessons learned from spiro-OMeTAD and PTAA in perovskite solar cells
TL;DR: In this article, the key electronic and morphological properties, doping strategies and mechanisms, and degradation pathways of both spiro-OMeTAD and polymer poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] are discussed.
Journal ArticleDOI
PTAA as Efficient Hole Transport Materials in Perovskite Solar Cells: A Review
TL;DR: A progress review on poly[bis(4]-phenyl)(2,4,6-trimethylphenyl)amine (PTAA) for perovskite solar cells is provided in this article .
Journal ArticleDOI
A Multifaceted Ferrocene Interlayer for Highly Stable and Efficient Lithium Doped Spiro‐OMeTAD‐based Perovskite Solar Cells
Thomas Andrew. Webb,Xu Liu,Robert J. E. Westbrook,Stefanie Kern,Muhammad T. Sajjad,Sandra Jenatsch,K. D. G. Imalka Jayawardena,W. H. K. Perera,Igor P. Marko,Sanjayan Sathasivam,Bowei Li,Mozhgan Yavari,David J. Scurr,Morgan R. Alexander,Thomas J. Macdonald,Saif A. Haque,Stephen J. Sweeney,Wei Zhang +17 more
TL;DR: In this paper , the functionality of organometallocenes to bind to Li+ dopant ions, rendering them immobile and reducing their impact on the degradation of PSCs is presented.
Journal ArticleDOI
An ammonium-pseudohalide ion pair for synergistic passivating surfaces in FAPbI3 perovskite solar cells
TL;DR: In this article , an ion-pairing passivating agent, diethylammonium diethyldithiocarbamate, synchronously providing both cationic and anionic ions, which can convert the surfaces of lead halide perovskite into two types of water-resistant compositions by forming strong chemical bonds.
Journal ArticleDOI
Enabling full-scale grain boundary mitigation in polycrystalline perovskite solids.
Lichen Zhao,Pengyi Tang,Deying Luo,M. Ibrahim Dar,Felix Eickemeyer,Neha Arora,Qin Hu,Jingshan Luo,Yuhang Liu,Shaik M. Zakeeruddin,Anders Hagfeldt,Jordi Arbiol,Wei Huang,Qihuang Gong,Thomas P. Russell,Richard H. Friend,Michael Grätzel,Rui Zhu +17 more
TL;DR: In this paper , a brominated arylamine trimer was used to modify the crystallization kinetics of perovskite solar cells to reduce nonradiative recombination.
References
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Journal ArticleDOI
Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9%
Hui-Seon Kim,Chang-Ryul Lee,Jeong-Hyeok Im,Ki Beom Lee,Thomas Moehl,Arianna Marchioro,Soo-Jin Moon,Robin Humphry-Baker,Jun-Ho Yum,Jacques-E. Moser,Michael Grätzel,Nam-Gyu Park +11 more
TL;DR: The use of a solid hole conductor dramatically improved the device stability compared to (CH3NH3)PbI3 -sensitized liquid junction cells.
Journal ArticleDOI
Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells
TL;DR: A bilayer architecture comprising the key features of mesoscopic and planar structures obtained by a fully solution-based process is reported, providing important progress towards the understanding of the role of solution-processing in the realization of low-cost and highly efficient perovskite solar cells.
Journal ArticleDOI
Iodide management in formamidinium-lead-halide–based perovskite layers for efficient solar cells
Woon Seok Yang,Byung-wook Park,Eui Hyuk Jung,Nam Joong Jeon,Young Chan Kim,Dong Uk Lee,Seong Sik Shin,Jangwon Seo,Eun Kyu Kim,Jun Hong Noh,Sang Il Seok +10 more
TL;DR: The introduction of additional iodide ions into the organic cation solution, which is used to form the perovskite layers through an intramolecular exchanging process, decreases the concentration of deep-level defects, enabling the fabrication of PSCs with a certified power conversion efficiency.
Journal ArticleDOI
Efficient inorganic–organic hybrid heterojunction solar cells containing perovskite compound and polymeric hole conductors
Jin Hyuck Heo,Sang Hyuk Im,Jun Hong Noh,Tarak Nath Mandal,Choong-Sun Lim,Jeong Ah Chang,Yong Hui Lee,Hi-jung Kim,Arpita Sarkar,Md. K. Nazeeruddin,Michael Grätzel,Sang Il Seok +11 more
TL;DR: In this paper, a layered sandwich-type architecture is proposed for next-generation dye-sensitized solar cells, which consists of a bicontinuous three-dimensional nanocomposite of mesoporous (mp)-TiO2,w ith CH 3NH3PbII3 perovskite as light harvester, as well as a polymeric hole conductor.
Journal ArticleDOI
Origin and elimination of photocurrent hysteresis by fullerene passivation in CH3NH3PbI3 planar heterojunction solar cells
TL;DR: The trap states on the surface and grain boundaries of the perovskite materials are demonstrated to be the origin of photocurrent hysteresis and that the fullerene layers deposited onperovskites can effectively passivate these charge trap states and eliminate the notorious photocurrent Hysteresi.