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
Materials Science, Multidisciplinary
Shunran Li, Zhenghong Dai, Conrad A. Kocoj, Eric I. Altman, Nitin P. Padture, Peijun Guo
Summary: The timescale of the orthorhombic-to-tetragonal phase transition in methylammonium lead triiodide (MAPbI3) was investigated using nanosecond transient absorption spectroscopy. A clean signature of transient, reversible orthorhombic-to-tetragonal transition was observed on the tens-of-nanoseconds timescale. Compared to inorganic phase-change materials, MAPbI3 exhibited orders-of-magnitude-slower phase transition, indicating a large energy barrier for activating the hydrogen-bond network and cooperative octahedral rotations. This approach provides insights into phase-transition dynamics in metal halide perovskites (MHPs) and other hybrid materials.
Article
Chemistry, Physical
Alexandra A. Koegel, Iain W. H. Oswald, Chuy Rivera, Samantha L. Miller, M. Jewels Fallon, Timothy R. Prisk, Craig M. Brown, James R. Neilson
Summary: The layered Ruddlesden-Popper derivatives of CH3NH3PbI3 have shown promising potential as stable materials for photovoltaics. The rotational dynamics of the organic cations in these materials influence their optoelectronic properties. This study investigates the influence of cation dynamics on properties in the layered derivatives and provides insights into the relationship between the dimensionality of the inorganic layer and the rotational dynamics of the organic cations.
CHEMISTRY OF MATERIALS
(2022)
Article
Energy & Fuels
Wan-Ju Hsu, Emma C. Pettit, Richard Swartwout, Tamar Zhitomirsky Kadosh, Shreyas Srinivasan, Ella L. Wassweiler, Greg Haugstad, Vladimir Bulovic, Russell J. Holmes
Summary: Photovoltaic cells based on metal-halide perovskites have shown better performance than other thin film technologies and are comparable to devices based on silicon. Vapor transport codeposition (VTD) is used to process efficient photovoltaic cells. The efficiency of the devices is highest in films with excess lead iodide content.
Article
Chemistry, Physical
Giovanni Romanelli, Carla Andreani, Laura Fazi, Arthur Ishteev, Kamilla Konstantinova, Enrico Preziosi, Roberto Senesi, Aldo Di Carlo
Summary: This study presents an experimental investigation of methylammonium lead tribromide single crystals in different phases using inelastic and deep inelastic neutron scattering experiments. The research found that the changes in average hydrogen nuclear kinetic energy between phases are mainly influenced by zero-point vibrational energies rather than temperature effects. Furthermore, vibrational densities of states in the orthorhombic phase of MAPbBr3 were found to be consistent with previous results on powder samples, with only slight differences in vibrational modes compared to MAPbI3. The study concludes that zero-point energies and average nuclear kinetic energies in two-hybrid organic/inorganic perovskites are expected to be approximately the same within a harmonic framework.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Jiashang Zhao, Jia Li, Xiaohui Liu, Lars J. Bannenberg, Annalisa Bruno, Tom J. Savenije
Summary: This study investigates the structural and optoelectronic properties of co-evaporated MAPbI(3) films with varying thickness and a gradient in composition. Results show the presence of excess PbI2 and iodide deficiencies with increasing thickness, resulting in differently n-doped regions and the formation of an internal electric field. The charge carrier lifetimes are elongated in thicker films due to the separation of excess carriers under the influence of the electric field.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Kassio P. S. Zanoni, Lucia Martinez-Goyeneche, Chris Dreessen, Michele Sessolo, Henk J. Bolink
Summary: To ensure reproducibility in perovskite photovoltaics, the sublimation control of organic ammonium halides is crucial. This study presents a reproducible procedure for the coevaporation of PbI2 and MAI using an evaporator chamber setup with two quartz crystal microbalances. The MAPbI(3)-QCM is used to indirectly monitor the MAI evaporation, avoiding fluctuating sublimation rates caused by variations in MAI purity, resulting in consistently high-performing solar cells over a period of one and a half years.
Article
Multidisciplinary Sciences
Karl L. Heinze, Oleksandr Dolynchuk, Thomas Burwig, Jaykumar Vaghani, Roland Scheer, Paul Pistor
Summary: Vacuum-based co-evaporation technique is explored for the growth of MAPbI3 thin films, revealing insights into crystallization and phase evolution. Optimization of chamber pressure and deposition sequence leads to improved efficiency and device performance.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Ke Wang, Benjamin Ecker, Jinsong Huang, Yongli Gao
Summary: The research found that residual water vapor during the thermal evaporation of MAPbI(3) affects the decomposition of MAI and the quality of the film. An evaporation environment with water vapor pressure below 10(-8) Torr is required to fabricate high quality perovskite films.
Article
Chemistry, Physical
Isidora Susic, Lidon Gil-Escrig, Francisco Palazon, Michele Sessolo, Henk J. Bolink
Summary: This study presents a process to increase the complexity of vacuum-deposited lead halide perovskite films by multisource deposition and premixing. By adding guanidinium (GA+) to the material formulation, quadruple-cation perovskite films with enhanced thermal stability were obtained. The improved thermal stability was also observed in the corresponding solar cells. This work has important implications for the vacuum processing of complex perovskite formulations in photovoltaics and other fields of application.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Alexander D. Christodoulides, Peijun Guo, Lingyun Dai, Justin M. Hoffman, Xiaotong Li, Xiaobing Zuo, Daniel Rosenmann, Alexandra Brumberg, Mercouri G. Kanatzidis, Richard D. Schaller, Jonathan A. Malen
Summary: The newly developed RP phase perovskites based on MAPbI(3) show enhanced environmental stability compared to MAPbI(3) but degrade at elevated temperatures. Experimental results reveal that the thermal conductivities decrease with increasing n, primarily due to the influence of coherent phonons and reduced group velocity in RP phases.
Article
Chemistry, Physical
V. K. Sharma, R. Mukhopadhyay, A. Mohanty, V. Garcia Sakai, M. Tyagi, D. D. Sarma
Summary: The partial substitution of MA cations in MAPbI(3) by FA ions alters the dynamics of organic units, with temperature having different effects on the two types of perovskites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Tatsuya Chugenji, Makoto Ebihara, Kenji Katayama
Summary: This study used pattern-illumination time-resolved phase microscopy to investigate local charge carrier responses in a methyl-ammonium lead iodide film. The researchers observed inhomogeneity of photo-excited carriers on the film and identified spots with scarce photo-excited charge carriers. These spots corresponded to an intermediate species in a MAPbI(3) film prepared under methylammonium iodide-rich conditions.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Alexander J. Harding, Kevin D. Dobson, Babatunde A. Ogunnaike, William N. Shafarman
Summary: This study characterizes four organic halide salts used in alloyed perovskite solar cell fabrication, confirming their chemical and crystal structures and quantifying their vapor pressures in the temperature range of 150-300 degrees C. The data obtained provide a foundation for effectively controlling vapor phase concentrations during the vapor processing of alloyed perovskite solar cells.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Waldemar Kaiser, Damiano Ricciarelli, Edoardo Mosconi, Asma A. Alothman, Francesco Ambrosio, Filippo De Angelis
Summary: This study investigates the degradation mechanism and stability of tin-halide perovskites (THPs) in a water environment. The results show that THPs are more susceptible to dissolution in water compared to lead-based perovskites. Additionally, the study reveals that the success of THPs as photocatalysts can be attributed to the presence of hydrated amorphous surface layers that protect the inner structure from degradation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Robert D. J. Oliver, Pietro Caprioglio, Francisco Pena-Camargo, Leonardo R. V. Buizza, Fengshuo Zu, Alexandra J. Ramadan, Silvia G. Motti, Suhas Mahesh, Melissa M. McCarthy, Jonathan H. Warby, Yen-Hung Lin, Norbert Koch, Steve Albrecht, Laura M. Herz, Michael B. Johnston, Dieter Neher, Martin Stolterfoht, Henry J. Snaith
Summary: Research on wide bandgap metal-halide perovskites (MHPs) has intensified due to their potential for high efficiency solar cells. However, these perovskites face challenges with non-radiative losses and interface limitations that hinder their performance. By investigating energy losses and introducing specific treatments, such as the ionic additive 1-butyl-1-methylpipiderinium tetrafluoroborate, the researchers were able to improve the efficiency of MA-free wide bandgap perovskite solar cells.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Alvaro Tejada, Sven Peters, Amran Al-Ashouri, Silver Hamill Turren-Cruz, Antonio Abate, Steve Albrecht, Florian Ruske, Bernd Rech, Jorge Andres Guerra, Lars Korte
Summary: A quantitative analysis of thermally induced degradation of various device-relevant multi-cation hybrid perovskite films was conducted using spectroscopic ellipsometry. The study found that changes in organic cation concentrations can be quantified from the mid-infrared molecular absorption bands. Additionally, the formation of PbI2 and non-perovskite delta-CsPbI3 phases was evidenced through Bruggemann effective medium fits.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Chemistry, Physical
Wanchun Xiang, Jiahuan Zhang, Shengzhong (Frank) Liu, Steve Albrecht, Anders Hagfeldt, Zaiwei Wang
Summary: Metal halide perovskites are promising photovoltaic materials, and the intermediate phase during their fabrication plays a crucial role in determining the quality and performance of perovskite films. This review summarizes the research on the mechanism and applications of intermediate phase engineering (IPE) processes in various solution-processing technologies, and discusses the challenges and prospects of developing high-performance perovskite solar cells (PSCs) through IPE.
Article
Energy & Fuels
Fengshuo Zu, Marcel Ross, Lennart Frohloff, Dongguen Shin, Nir Tessler, Steve Albrecht, Norbert Koch
Summary: Tremendous progress has been made in utilizing metal halide perovskites (MHPs) in various applications, particularly in photovoltaics, in the past decade. To fully realize the potential of MHP materials in optoelectronic devices, a better understanding of the electronic energy level alignment at perovskite-based interfaces is required, especially under device operation conditions.
Article
Energy & Fuels
Silvia Mariotti, Klaus Jaeger, Marvin Diederich, Marlene S. Haertel, Bor Li, Karl Sveinbjoernsson, Sarah Kajari-Schroeder, Robby Peibst, Steve Albrecht, Lars Korte, Tobias Wietler
Summary: Combining perovskite and silicon solar cells can enhance the power conversion efficiency of silicon single-junction technology.
Article
Chemistry, Physical
Marko Jost, Eike Koehnen, Amran Al-Ashouri, Tobias Bertram, Spela Tomsic, Artiom Magomedov, Ernestas Kasparavicius, Tim Kodalle, Benjamin Lipovsek, Vytautas Getautis, Rutger Schlatmann, Christian A. Kaufmann, Steve Albrecht, Marko Topic
Summary: A monolithic perovskite/CIGS tandem solar cell with a certified power conversion efficiency (PCE) of 24.2% is demonstrated. The optimal device stack is determined using optical simulations, and the energy yield is evaluated. The results show the high potential of perovskite/CIGS tandem solar cells in significantly enhancing energy output.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Physical
Dorothee Menzel, Amran Al-Ashouri, Alvaro Tejada, Igal Levine, Jorge Andres Guerra, Bernd Rech, Steve Albrecht, Lars Korte
Summary: Through ultra-sensitive near-UV photoelectron spectroscopy, the energy level alignment and defect formation at the perovskite/C-60 interface are investigated. It is found that the fullerene C-60 as the electron transport layer limits the open circuit voltage in metal halide perovskite solar cells. The voltage enhancement with the incorporation of a LiF interlayer at the interface can be attributed to a dipole effect and the presence of fixed charges.
ADVANCED ENERGY MATERIALS
(2022)
Editorial Material
Chemistry, Physical
Kari Sveinbjoernsson, Bor Li, Silvia Mariotti, Enrico Jarzembowski, Lukas Kegelmann, Andre Wirtz, Felix Fruehauf, Anika Weihrauch, Ralf Niemann, Lars Korte, Fabian Fertig, Joerg W. Wueller, Steve Albrecht
Summary: A monolithic two-terminal perovskite/silicon tandem solar cell was fabricated based on an industrial silicon bottom cell with mass-production feasible processes, showing a steady-state power conversion efficiency of 28.7% and an open-circuit voltage of over 1.9 V.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Physical
Jarla Thiesbrummel, Francisco Pena-Camargo, Kai Oliver Brinkmann, Emilio Gutierrez-Partida, Fengjiu Yang, Jonathan Warby, Steve Albrecht, Dieter Neher, Thomas Riedl, Henry J. Snaith, Martin Stolterfoht, Felix Lang
Summary: Understanding the performance losses in all-perovskite tandem photovoltaics is crucial for advancing toward commercialization. This study characterizes the individual sub-cells in all-perovskite tandem stacks and shows that non-radiative losses dominate the overall recombination. Through various approaches, the open-circuit voltage of the high-gap perovskite subcell is enhanced, leading to improved efficiency in all-perovskite tandem solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Amran Al-Ashouri, Mantas Marcinskas, Ernestas Kasparavicius, Tadas Malinauskas, Axel Palmstrom, Vytautas Getautis, Steve Albrecht, Michael D. McGehee, Artiom Magomedov
Summary: The wettability issue of the Me-4PACz hole-selective monolayer is resolved by adding a second component to the precursor solution. This not only improves the device yield but also maintains similar performance.
ACS ENERGY LETTERS
(2023)
Article
Energy & Fuels
Philipp Wagner, Philipp Tockhorn, Sebastian Hall, Steve Albrecht, Lars Korte
Summary: Research focuses on perovskite/silicon tandem solar cells in two- or four-terminal configurations. This paper presents an alternative monolithic architecture using three terminals, combining a semi-transparent perovskite top cell with a silicon heterojunction bottom cell. The presence of a p/n recombination junction allows for current regulation, making current matching between subcells unnecessary. It is found that maximizing current generation in the top cell, rather than current matching, leads to the highest power conversion efficiency.
Article
Chemistry, Multidisciplinary
Ivona Kafedjiska, Igal Levine, Artem Musiienko, Natalia Maticiuc, Tobias Bertram, Amran Al-Ashouri, Christian A. Kaufmann, Steve Albrecht, Rutger Schlatmann, Iver Lauermann
Summary: The performance of five hole-transporting layers (HTLs) in single-junction perovskite and Cu(In, Ga)Se-2 (CIGSe)-perovskite tandem solar cells was investigated. Among them, NiOx:Cu+SAM was found to be the most suitable HTL for the monolithic CIGSe-perovskite tandem devices. It exhibited superior interfacial charge-carrier dynamics and achieved a power-conversion efficiency of 23.4%, V-oc of 1.72V, and a fill factor of 71%.
ADVANCED FUNCTIONAL MATERIALS
(2023)