Article
Chemistry, Multidisciplinary
Xiao Wu, Junjie Ma, Minchao Qin, Xinlu Guo, Yuhao Li, Zhaotong Qin, Jianbin Xu, Xinhui Lu
Summary: Light soaking has been found to enhance device performance of CsPb(I1-xBrx)(3) based PSCs by promoting the migration of halide ions, leading to defect passivation and device improvements. Incorporating slightly over-stoichiometric PbI2 in the precursor is proposed as an effective means to suppress the light soaking effect.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Fengjiu Yang, Rowan W. MacQueen, Dorothee Menzel, Artem Musiienko, Amran Al-Ashouri, Jarla Thiesbrummel, Sahil Shah, Karunanantharajah Prashanthan, Daniel Abou-Ras, Lars Korte, Martin Stolterfoht, Dieter Neher, Igal Levine, Henry Snaith, Steve Albrecht
Summary: In this study, rubidium iodide is used as an additive for methylammonium-free Sn-Pb perovskites. It is found that the RbI additive reduces the defect density, recombination losses, and carrier trapping, leading to improved carrier lifetime and open-circuit voltage of the perovskite films. The best efficiency achieved is over 20%.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaobo Zhang, Xiaoqing Chen, Yichuan Chen, Nabonswende Aida Nadege Ouedraogo, Jingjie Li, Xiulong Bao, Chang Bao Han, Yasuhiro Shirai, Yongzhe Zhang, Hui Yan
Summary: Stability is a key obstacle for the commercialization of perovskite solar cells as their power conversion efficiency approaches that of commercial solar cells. Rapid degradation in PCE is caused by external fields like bias voltage, light, and heat leading to ion migration. Experimental evidence shows that introducing layers like phenethylammonium iodide or poly-methyl methacrylate can inhibit ion migration and improve device stability.
NANOSCALE ADVANCES
(2021)
Article
Energy & Fuels
Biao Li, Minshen Lin, Chenxia Kan, Pengjie Hang, Yuxin Yao, Zechen Hu, Ying Wang, Yiqiang Zhang, Wenxing Zhong, Deren Yang, Xuegong Yu
Summary: The light soaking effect in perovskite solar cells has attracted significant attention. This study reveals that the power conversion efficiency of FA(x)MA(1-x)PbI(3) perovskite solar cells increases from 7.5% to 20.5% under continuous light illumination. The LS effect is attributed to the modulation of mobile ion distribution by the generated photovoltage, which enhances charge extraction ability and reduces interface recombination. Moreover, the introduction of Cs+ suppresses the LS effect by reducing the density of accumulated mobile ions.
Article
Multidisciplinary Sciences
Renxing Lin, Yurui Wang, Qianwen Lu, Beibei Tang, Jiayi Li, Han Gao, Yuan Gao, Hongjiang Li, Changzeng Ding, Jin Wen, Pu Wu, Chenshuaiyu Liu, Siyang Zhao, Ke Xiao, Zhou Liu, Changqi Ma, Yu Deng, Ludong Li, Fengjia Fan, Hairen Tan
Summary: All-perovskite tandem solar cells with an immiscible 3D/3D bilayer heterojunction achieve a record-high PCE of 28% and retain over 90% of their initial performance after 600 hours of continuous operation.
Article
Chemistry, Multidisciplinary
Bart Roose
Summary: Perovskite solar cells have excellent self-passivating properties, but face challenges in reproducibility and conflicting results. Dynamic processes post-fabrication play a crucial role in material properties and need to be controlled; a short light soaking treatment can help mobilize ions and achieve self-passivation.
Article
Chemistry, Multidisciplinary
Alexander James Doolin, Rhys Gareth Charles, Catherine S. P. De Castro, Rodrigo Garcia Rodriguez, Emmanuel Vincent Pean, Rahul Patidar, Tom Dunlop, Cecile Charbonneau, Trystan Watson, Matthew Lloyd Davies
Summary: The study introduces a green solvent selection method that achieves deposition of perovskite films without DMF, leading to improved crystal quality and photovoltaic device efficiency.
Article
Chemistry, Physical
Zeeshan Ahmad, Rebecca A. Scheidt, Matthew P. Hautzinger, Kai Zhu, Matthew C. Beard, Giulia Galli
Summary: This study investigates the mechanism by which the presence of unreacted lead iodide in organic-inorganic lead halide perovskite solar cells increases the power conversion efficiency. The researchers identify the role of surfaces and interfaces between perovskite films and excess lead iodide, showing how different band alignments can lead to passivation of surface defects or hole injection. Through simulations and spectroscopy techniques, they demonstrate how excess lead iodide affects the formation of defects and recombination in perovskite solar cells.
ACS ENERGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Sagar Bhattarai, Rahul Pandey, Jaya Madan, Asya Mhamdi, Abdelaziz Bouazizi, Deboraj Muchahary, Dipankar Gogoi, Arvind Sharma, T. D. Das
Summary: This study focuses on the numerical modeling of lead-free methylammonium tin tri-iodide based perovskite solar cells. The selection of MASnI(3) as the perovskite material allows for a wider absorption spectrum and lower toxicity compared to higher bandgap MAPbI(3)-based PSCs. By using copper antimony sulfide and zinc oxide as carrier transport materials and optimizing the thickness of MASnI(3), the device achieved a higher power conversion efficiency.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Multidisciplinary Sciences
Yurui Wang, Renxing Lin, Xiaoyu Wang, Chenshuaiyu Liu, Yameen Ahmed, Zilong Huang, Zhibin Zhang, Hongjiang Li, Mei Zhang, Yuan Gao, Haowen Luo, Pu Wu, Han Gao, Xuntian Zheng, Manya Li, Zhou Liu, Wenchi Kong, Ludong Li, Kaihui Liu, Makhsud I. Saidaminov, Lijun Zhang, Hairen Tan
Summary: By reversing the processing order and using a substrate configuration, the authors bury the oxidizable narrow-bandgap perovskites in all-perovskite tandem solar cells, resulting in an efficient and stable device with an efficiency of 25.3%.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xiang Deng, Fengzhu Li, Quan Wang, Danjun Liu, Francis Lin, Dong Shen, Dangyuan Lei, Yung-Kang Peng, Zonglong Zhu, Alex K. -Y. Jen
Summary: Interface engineering using robust fluoroterminated TiO2 nanosheets (F-TiO2 NSs) as interlayers between perovskite and electron-transporting layers greatly enhances the performance and stability of inverted perovskite solar cells. The flat morphology of F-TiO2 NSs allows for close contact with perovskite and abundant surface fluoro groups to interact with ions, preventing the formation of cation vacancies and alleviating surface defects, leading to a remarkable power conversion efficiency of 22.86%. Devices with F-TiO2 NSs interlayers also exhibit enhanced operational stability, maintaining over 90% of their initial efficiencies after 1,000 hours of monitoring at the maximum power point under day/night cycles.
Editorial Material
Chemistry, Multidisciplinary
Yu-Hao Deng
Summary: The extreme sensitivity of hybrid organic-inorganic perovskites to electron beam radiation can lead to significant misidentifications, making it difficult to obtain their intrinsic structure. A study challenged the claim of coexistence of methylammonium lead iodide in different phases, suggesting that it may have been due to damage from excessive electron beam irradiation. This highlights the importance of considering the effects of electron beam radiation on the integrity of perovskite samples in research.
ADVANCED MATERIALS
(2021)
Article
Energy & Fuels
Daming Zheng, Tao Zhu, Thierry Pauporte
Summary: The synthesis of Cs(x)FA(1-x)Pbl(3) perovskite photovoltaic layers without methylammonium and bromide, using a coadditives approach with potassium chloride and ammonium chloride additives, results in enhanced crystallinity and stability. The addition of KCl and NH4Cl plays a key role in producing a pure PVK phase and controlling ionic mobility, leading to improved performance in Cs(0.1)FA(0.9)Pbl(3) cells with stabilized power conversion efficiency of 20.02%.
Article
Chemistry, Physical
Li Liu, Ke Xu, A' Lester Allen, Xueming Li, Hong Xia, Lijun Peng, Jin Z. Zhang
Summary: This study demonstrated that phenylalanine (Phe) is an effective capping ligand for synthesizing MAPbBr(3) perovskite nanocrystals (PNCs) when used with (3-aminopropyl) triethoxysilane (APTES) and oleic acid (OA) or methylphosphoric acid (MPA). The combined use of Phe, APTES, and OA or MPA was shown to improve PL and stability of PNCs, attributed to Phe's ability to stabilize surface defects related to Pb2+, CH3NH3+, and Br-. A proposed model explained the passivation mechanism involving Phe in conjunction with other amine and acid ligands for perovskite passivation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Noor Titan Putri Hartono, Mansoor Ani Najeeb, Zhi Li, Philip W. Nega, Clare A. Fleming, Xiaohe Sun, Emory M. Chan, Antonio Abate, Alexander J. Norquist, Joshua Schrier, Tonio Buonassisi
Summary: This study presents a systematic exploration of nine bipyridine-and terpyridine-based additives for the crystallization of lead-halide perovskite. A previously unreported additive, 6,6'-dimethyl-2,2'-dipyridyl, is found to significantly improve the crystallization of methylammonium lead iodide. The machine-learning-guided high-throughput experimentation strategy used in this study can be applied to other crystal growth problems.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Peifeng Li, Jie Wang, Hong Chen, Hao Zhang, Cheng Li, Wenjie Xu, Renzhi Li, Lin Zhu, Nana Wang, Jianpu Wang
Summary: In this study, hole-transport-layer-free light-emitting diodes (LEDs) based on solution-processed multiple-quantum-well perovskite were demonstrated. The unique structure of vertically graded distribution and the enhanced charge capture efficiency led to an external quantum efficiency of 9.0% for these LEDs.
CHINESE CHEMICAL LETTERS
(2022)
Article
Physics, Applied
Qifen Zhu, Penggang Li, Na Gao, Xun Hu, Cheng Li, Kai Huang, Junyong Kang, Rong Zhang
Summary: This study establishes a method to determine the behaviors of localized surface plasmons (LSPs) on dielectric interfaces based on deductions from far-field reflectance and transmittance spectra. The method is validated through numerical calculations and compared with direct simulations. The results show that the method is effective for LSPs located on the dielectric interface.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Christina Witt, Nico Leupold, Philipp Ramming, Konstantin Schoetz, Ralf Moos, Fabian Panzer
Summary: The study reveals that powder microstructure affects compaction processes and final film properties, larger particles result in less dense films with higher surface roughness, and exhibit more pronounced plastic deformation during pressure treatment. This deformation leads to a reduction in crystallite size and increased nonradiative, defect-associated excited state recombination, deteriorates the grain boundary quality, and facilitates ion migration.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Nico Leupold, Philipp Ramming, Irene Bauer, Christina Witt, Jennifer Jungklaus, Ralf Moos, Helen Grueninger, Fabian Panzer
Summary: In this study, we investigated the impact of the size of methylammonium iodide (MAI) reactants on the mechanochemical powder synthesis of halide perovskite methylammonium lead iodide (MAPbI(3)). Our results showed that the particle size of the perovskite powder increased and its defect density decreased with increasing MAI reactant size. This behavior seemed to be associated with the influence of MAI size on the time durations of MAPbI(3) synthesis and the crushing stage during ball milling.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Kostas Fykouras, Jonathan Lahnsteiner, Nico Leupold, Paul Tinnemans, Ralf Moos, Fabian Panzer, Gilles A. A. de Wijs, Menno Bokdam, Helen Grueninger, Arno P. M. Kentgens
Summary: In this study, the reorientational dynamics of MA ions in mixed halide perovskites are investigated using experimental and simulation methods. It is found that the dynamics of MA ions are influenced by the disorder in halide distribution. These findings provide fundamental insights into charge carrier diffusion and lifetime in mixed halide perovskite materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Jing He, Sijie Jiang, Lihua Lu, Wenfeng Li, Jing Zhang, Wenjie Wei, Zhongli Guo, Beier Hu, Ziang Wan, Yikai Yun, Yuanyuan Tian, Kai Huang, Mengyu Chen, Cheng Li
Summary: The rapid development of UV photodetectors in various applications has been seen in the last few decades. Both III-nitride semiconductors and metal halide perovskites have shown promising UV-sensing optoelectronic properties, but they still face challenges such as high temperature growth or low photocurrent in the UV range. In this study, an innovative MAPbCl(3)/GaN particle hybrid device with all-solution-processed deposition methods was demonstrated. The hybrid device, with optimal concentration of GaN particles, showed significantly enhanced photo-sensing ability, with a responsivity of 86 mA W-1, a detectivity of 3.1 x 10(11) Jones, and a rise/fall time of 1.1/10.7 ms at 360 nm. The increased photocurrent can be attributed to the enhanced UV absorption of GaN particles and facilitated charge separation and photoconductive gain at the MAPbCl(3)/GaN heterojunction. This work opens up possibilities for large-scale, low-cost UV photodetectors in versatile applications.
Article
Nanoscience & Nanotechnology
Zikang Ai, Lingjie Bao, Bohan Xiao, Jintao Yuan, Wenfeng Li, Weiyi Lin, Cheng Li, Qijin Cheng
Summary: We propose a novel single crystal growth strategy for high-quality MoS2 and enhance the performance of the metal-semiconductor-metal structure photodetector by depositing a layer of HfO2 on the surface of MoS2.
Article
Chemistry, Multidisciplinary
Yuheng Shen, Yulin Li, Wencheng Chen, Sijie Jiang, Cheng Li, Qijin Cheng
Summary: A low power remote plasma-enhanced chemical vapor deposition is used to directly grow graphene nanowalls, which effectively improves the growth rate and reduces defects. Hafnium oxide, employed as an interfacial layer, acts as an electron-blocking and hole transport layer, minimizing recombination and reducing dark current. The fabricated photodetector shows excellent performance with low dark current, high responsivity, high specific detectivity, and high external quantum efficiency.
Article
Chemistry, Physical
Jing Zhang, Beier Hu, Zhongli Guo, Hongqiang Luo, Rui Wang, Mingpo Li, Mengyu Chen, Cheng Li
Summary: This study focuses on improving the stability and performance of perovskite solar cells (PSCs) by cross-layer modification using a large-particle Zr-based Metal-Organic Framework (MOF). SnO2 particles are dispersed into the ordered porous scaffold of Zr-MOF, resulting in an improved electron transport layer with increased contact area with the perovskite active layer. The crystallization and defects of the perovskite layer are optimized, and ion migration is suppressed by the infiltrated Zr-MOF. The power conversion efficiency (PCE) of the modified PSCs is increased from 17.48% to 18.25%, and it retains 99% of its initial value after storage for 800 hours under ambient conditions with high humidity. This work provides a simple strategy to enhance the stability and performance of PSCs using designable MOF materials.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Zhuoying Jiang, Ying Jiang, Mengyu Chen, Jinchai Li, Penggang Li, Binghuan Chen, Shanshan Zhao, Jie Wang, Sijie Jiang, Miaomin Cai, Lin Li, Cheng Li, Kai Huang, Weifang Lu, Junyong Kang, Rong Zhang
Summary: An efficient approach to design and optimize GaN-based LED structures using machine learning is demonstrated. The convolutional neural network model provides accurate predictions of internal quantum efficiency and light output power density for different LED structures. This method enables direct guiding and accelerates the development cycle of GaN-based LEDs.
LASER & PHOTONICS REVIEWS
(2023)
Review
Chemistry, Multidisciplinary
Yuanyuan Tian, Hongqiang Luo, Mengyu Chen, Cheng Li, Stephen V. Kershaw, Rong Zhang, Andrey L. Rogach
Summary: Commercial infrared photodetectors based on inorganic semiconductors have drawbacks such as high cost and poor compatibility with silicon integrated circuits. Solution-processable semiconductor-based devices, particularly those using Hg chalcogenide colloidal quantum dots, offer a promising alternative with their broad and tunable photo-responses. This review summarizes the advancements in the synthesis methods, property control, device engineering, and integration of Hg chalcogenide colloidal quantum dot photodetectors, and highlights their potential for low-cost, highly-sensitive, and compact infrared sensing applications.
Article
Materials Science, Multidisciplinary
Wenfeng Li, Qi Wu, Lihua Lu, Yuanyuan Tian, Hongqiang Luo, Yikai Yun, Sijie Jiang, Mengyu Chen, Cheng Li
Summary: In this work, a series of structurally-related ammonium salts are used to fabricate solution-processed two-dimensional perovskite photodetectors. The distribution and crystallinity of the low-dimensional components can be controlled by the phenyl and alkyl structures, which significantly affect the photo-sensing abilities. By optimizing the butylamine spacer, a high-quality quasi-2D perovskite film is achieved with improved charge separation and photoconductive gain, resulting in high detectivity and stability. This work provides insights into the development of sensitive and stable perovskite photodetectors.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Konstantin Schotz, Fabian Panzer, Michael Sommer, Heinz Bassler, Anna Kohler
Summary: The optoelectronic performance of organic semiconductor devices is influenced by the disorder present in the film. By studying the linewidth of optical spectra, we have investigated the effect of conjugation length distribution on static disorder. Our findings provide insights for the design of low disorder and high mobility polymeric semiconductors.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Simon Biberger, Konstantin Schoetz, Philipp Ramming, Nico Leupold, Ralf Moos, Anna Koehler, Helen Grueninger, Fabian Panzer
Summary: This research investigates the impact of ionic liquids (ILs) on the formation process of perovskite films in perovskite solar cells. It reveals that ILs can delay the transformation and decrease the growth rate of perovskite, but have no effect on the formation of perovskite-solvent complexes. Additionally, ILs can efficiently passivate defect states in the coated films.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Electrical & Electronic
Ruifan Tang, Guanqi Li, Ying Jiang, Na Gao, Jinchai Li, Cheng Li, Kai Huang, Junyong Kang, Tao Wang, Rong Zhang
Summary: This article presents an ultraviolet photodetector based on a Ga2O3/GaN heterostructure with tunable multiband detectivity and record ultranarrow response. The high responsivity and external quantum efficiency make it suitable for various applications.
ACS APPLIED ELECTRONIC MATERIALS
(2022)