Review
Biochemistry & Molecular Biology
Fatemeh Heidari Gourji, Dhayalan Velauthapillai
Summary: Despite the flexibility in optoelectronic applications, Pb-based perovskites face challenges of instability and toxicity. The research community is exploring stable non-toxic perovskite materials, with a focus on Cs-based Pb-free halide double perovskites. Current research includes both theoretical and experimental studies, along with the impact of metal dopants on their performance in photovoltaics.
Article
Multidisciplinary Sciences
Ejaz Ahmad Khera, Hafeez Ullah, Muhammad Imran, R. M. Arif Khalil, Fayyaz Hussain, Hassan Algadi
Summary: The study investigated the properties of halide perovskites using the FP-LAPW method in the frame work of DFT, with a focus on structural, elastic, charge conduction, and photoresponsive aspects. Results suggest that Sn2+ and I1- are suitable for photoresponsive resistive random access memory devices. Optically, CsSnI3 was found to have high absorbance of UV, visible, and IR radiations, making it a suitable material for optoelectronic memristors.
ADVANCED THEORY AND SIMULATIONS
(2021)
Article
Materials Science, Multidisciplinary
Eita Nakanishi, Ryosuke Nishikubo, Fumitaka Ishiwari, Tomoya Nakamura, Atsushi Wakamiya, Akinori Saeki
Summary: Connecting data science with experimental methods is critical for accelerating material science research. In this study, a multivariate analysis was used to explore the effects of A-site organic cation mixing in tin iodide perovskite solar cells. Through experimental screening, a new perovskite material with a power conversion efficiency of 7.22% was identified.
ACS MATERIALS LETTERS
(2022)
Review
Chemistry, Physical
Yue-Min Xie, Qifan Xue, Hin-Lap Yip
Summary: Metal-halide perovskites are considered ideal photovoltaic materials due to their variable crystal material composition and superb optoelectronic performance, but the complexity of their crystallization process can lead to reduced film crystallinity and decreased device performance. Extensive research has been conducted on the crystallization kinetics of 3D MHPs, and methods for modulating MHP crystallization have been summarized, including solution engineering, compositional engineering, interfacial engineering, and additive passivation. The review also provides insights into the prospects and challenges in revealing perovskite crystallization kinetics.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Hongki Kim, Gi Rim Han, Seong Keun Kim, Taecheon Lyu, Wonbin Choi, Jong Woo Lee, Joon Hak Oh
Summary: The rapid development of organic-inorganic hybrid perovskites has met the demand for advanced solar power generation. We observed strong band-filling in FA(0.5)MA(0.5)Pb(0.5)Sn(0.5)I(3) polycrystal-line films under continuous-wave excitation, which is more evident than that in typical MAPbI(3). Based on this finding, we proposed a novel electronic barrier adaptive concentrator-type photovoltaic system achieved by inserting an electronic barrier-inducing indene-C-60 bisadduct layer (ICBA). Under concentrated illumination, the potential barrier between FA(0.5)MA(0.5)Pb(0.5)Sn(0.5)I(3) and ICBA significantly decreases, resulting in a higher fill factor and power conversion efficiency of 17.0% compared to the reference device (15.6%). Our study provides a proof-of-concept demonstration of a novel photovoltaic system utilizing the photophysical property of perovskites.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Liping Peng, Yulin Xie, Changquan Yang
Summary: This study investigated the photoelectric properties of different metal atoms adsorbed on a 2D perovskite surface, finding that Bi atom adsorption results in the most stable structure, improves charge carrier transfer, and enhances the photoelectric properties significantly compared to Ag and Au adsorption. Additionally, the impact of Bi atom adsorption on 2D perovskite is stronger than that of Ag or Au, as confirmed by light absorption spectrum analysis.
Article
Chemistry, Multidisciplinary
Weijian Wang, Yangchun Yu, Sanam Attique, Jiahui Hou, Fangying Jun, Yiquan Xie, Lebao Mao, Xiaoqing Yu, Xiuhua Zhang, Shengfu Wang, Chongchong Wu, Bingqiang Cao, Shikuan Yang
Summary: The researchers proposed an ultimately green process to prepare CH3NH3PbBr3 (MAPbBr(3)) nanowires without using any organic solvents, acids, and alkalis, which involves the use of only PbBr2 and water, and converts Pb(OH)Br nanowires into MAPbBr(3) nanowires via a thermal evaporation technique. The optical properties of the prepared MAPbBr(3) nanowires are comparable to those prepared using organic solvents, making this fabrication method environmentally friendly and cost-effective.
Article
Chemistry, Physical
Mailde S. Ozorio, A. C. Dias, Julian F. R. Silveira, Juarez L. F. Da Silva
Summary: Density functional theory calculations were performed to investigate the effects of halide anion and trivalent cation substitution on the structural, energetic stability, optoelectronic, and excitonic properties of lead-free zero-dimensional perovskites. It was found that the replacement of halide species had a significant impact on the physical properties, with most properties changing linearly from Cl to Br to I. Smaller halide species led to higher energetic stability and smaller band gap energy. The electronic band structures were flat due to the zero-dimensional nature of the crystal structures. Quantum confinement resulted in significantly higher exciton binding energies compared to conventional three-dimensional counterparts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Saeed S. I. Almishal, Ola Rashwan
Summary: This study investigated the structural, electronic, and optical properties of the CsGeI3-xBrx halide perovskite system and compared them to the extensively studied CsPbI3. The substitution of Pb2+ with Ge2+ led to structural distortion and changes in the bandgap, while the mixed halide compounds significantly altered the optical properties.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Anupriya Nyayban, Subhasis Panda, Avijit Chowdhury
Summary: Structural stability is a major concern for perovskite solar cells, but compositional engineering can effectively address this issue. The structural, electronic, and optical properties of bromide mixed orthorhombic RbPb(I1-XBrX)(3) were studied using density functional theory. The lowest energy band gaps of 2.288 eV and 2.986 eV were obtained for bromide mixing of x = 0.50 using PBE and TB-mBJ, respectively. Mixed halide structures showed smaller effective mass, facilitating better carrier transport. PBE predicted Mott-Wannier type excitons, while TB-mBJ predicted Frenkel type excitons for bromide mixing of x = 0.75 and Mott-Wannier type for other mixings. The highest spectroscopic limited maximum efficiency (SLME) of 14.0% was observed for equal admixture of I and Br using PBE. The calculated properties are consistent with reported data of similar structures.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Adam D. Wright, Jay. B. Patel, Michael B. Johnston, Laura M. Herz
Summary: Understanding the mechanism of light-induced halide segregation is important for using mixed-halide perovskites in multijunction solar cells. Photoluminescence spectroscopy reveals that increasing temperature and light intensity can counteract halide segregation. The acceleration and deceleration of halide segregation with temperature are attributed to the trade-off between temperature activation and entropic factors. High light intensities can also reverse halide segregation, but only temporarily. These findings contribute to a better understanding of halide segregation and the development of efficient and stable perovskite solar cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhaojian Xu, Ross A. Kerner, Joseph J. Berry, Barry P. Rand
Summary: Due to their straightforward stoichiometry-bandgap tunability, mixed-halide perovskites are ideal for many optoelectronic devices. However, unwanted halide segregation under operational conditions restricts practical use, and the origin of voltage-induced halide segregation is still unclear.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Congcong Chen, Emily E. Morgan, Yang Liu, Jian Chen, Ram Seshadri, Lingling Mao
Summary: Five new hybrid iodides with different structural dimensions and optical properties were synthesized using a single type of organic cation. The organic cation demonstrated flexibility in determining the structural dimensionality of the hybrid materials.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Mrinmoy Roy, Vikram, Bhawna, Urvi Dedhia, Aftab Alam, M. Aslam
Summary: A simple synthesis process for compound-phase perovskite nanoparticles was introduced, which involves mixing two pure-phase perovskites using ultrasonic vibration. The method eliminates the need for designing a reaction or selecting specific precursors, providing better stability and synthesis efficiency.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Junsang Cho, Preethi S. Mathew, Jeffrey T. DuBose, Prashant Kamat
Summary: 2D lead halide perovskites with tunable bandgap and enhanced chemical stability are useful for designing optoelectronic devices. Reducing dimensionality can increase resistance to light-induced ion migration, but also decreases the efficiency of halide ion segregation and segregation rate constant, leading to a decrease in charge-carrier lifetime.
ADVANCED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Dongsheng Cui, Yawei Du, Zhenhua Lin, Mengyang Kang, Yifei Wang, Jie Su, Jincheng Zhang, Yue Hao, Jingjing Chang
Summary: A memory device with an Ag/Ga2O3/Pt structure has been successfully fabricated, exhibiting both bipolar resistive switching (BRS) and unipolar resistive switching (URS) behaviors. It was found that the bipolar and unipolar modes can be set by applying a positive voltage with the same compliance current (I-cc) of 1 mA. The reset process involves a polarity change of sweeping voltages without I-cc to switch between the bipolar and unipolar modes. The conduction mechanisms are identified as conducting filaments (CFs) for the low resistance state (LRS), and schottky emission for BRS, and space charge limited conduction mechanism for URS in the high resistance states (HRS), respectively.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jian He, Qingrui Wang, Yumeng Xu, Xing Guo, Long Zhou, Jie Su, Zhenhua Lin, Jincheng Zhang, Yue Hao, Jingjing Chang
Summary: Researchers have successfully achieved surface p-type doping for CsPbIBr2-based perovskite solar cells using 1,5-Diaminopentane dihydroiodide, improving the hole extraction efficiency and reducing energy losses. They have also filled the Cs- and Br-vacancies at the interface, thereby improving the quality of the perovskite film. As a result, the target device achieved a high efficiency of 11.02% with improved stability.
Article
Chemistry, Multidisciplinary
Linfeng Ye, Pengfei Guo, Jie Su, Kaiyuan Zhang, Chen Liu, Penghui Yang, Wenhao Zhao, Pengzhen Zhao, Zhe Liu, Jingjing Chang, Qian Ye, Hongqiang Wang
Summary: An effective surface reconstruction strategy is demonstrated to convert excess PbI2 into a gradient lead sulfate-silica bi-layer, which stabilizes the perovskite film and reduces interfacial charge transfer barrier in perovskite solar cells (PSCs). The resulting PSCs show high efficiency and remarkable environmental stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yumeng Xu, Xing Guo, Zhenhua Lin, Qingrui Wang, Jie Su, Jincheng Zhang, Yue Hao, Keke Yang, Jingjing Chang
Summary: By designing a multifunctional elastomer with abundant hydrogen bonds and carbonyl groups, the chemical bonding between polymer and perovskite has been enhanced, leading to the preferential growth of high-quality perovskite film. The hydrogen-bonded polymer network improves air stability, flexibility, and reduces lead release, paving the way for industrialization of high-performance flexible perovskite solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Applied
Hongye Ma, Wentao Wang, Yuncong Cai, Zhengxing Wang, Tao Zhang, Qian Feng, Yiqiang Chen, Chunfu Zhang, Jincheng Zhang, Yue Hao
Summary: The model of lateral beta-Ga2O3 metal-oxide-semiconductor field-effect transistor (MOSFET) was established using Sentaurus Technology Computer Aided Design software. The gate-to-drain distance of the device was 13.7 mu m, and the breakdown voltage was 1135 V. The effects of heavy ions' incident position, angle, drain bias voltage, and linear energy transfer on the single event effect were studied. The research shows that the terminal structure of the field plate is reliable means to reduce the single particle effect.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Analytical
Xiangdong Li, Meng Wang, Jincheng Zhang, Rui Gao, Hongyue Wang, Weitao Yang, Jiahui Yuan, Shuzhen You, Jingjing Chang, Zhihong Liu, Yue Hao
Summary: In this paper, the shifting process of the threshold voltage (V-TH) of p-GaN gate HEMTs under BTI stress was carefully monitored to uncover the main cause of this effect. HEMTs without TDGB stress showed a high V-TH shift of 0.62 V, while those subjected to 424 s of TDGB stress exhibited a limited V-TH shift of 0.16 V. The mechanism behind this is the Schottky barrier lowering effect induced by TDGB stress, which enhances hole injection from the gate metal to the p-GaN layer, thereby improving V-TH stability by replenishing lost holes during BTI stress. This study provides experimental evidence that the gate Schottky barrier plays a dominant role in the BTI effect of p-GaN gate HEMTs.
Article
Chemistry, Analytical
Zhanfei Han, Xiangdong Li, Hongyue Wang, Jiahui Yuan, Junbo Wang, Meng Wang, Weitao Yang, Shuzhen You, Jingjing Chang, Jincheng Zhang, Yue Hao
Summary: The channel temperature distribution and breakdown points are difficult to monitor for traditional p-GaN gate HEMTs due to the opaque metal gate. In this study, p-GaN gate HEMTs with transparent indium tin oxide (ITO) were processed, enabling the use of ultraviolet reflectivity thermal imaging equipment to capture the desired information. The findings reveal that heat concentration occurs near the gate field in the access area under high power stress, and the sidewall of p-GaN is identified as the weakest spot.
Article
Chemistry, Multidisciplinary
Xian-Gang Hu, Yi-Ming Zhao, Hongyu Yang, Peng-Xiang Hou, Chang Liu, Jingjing Chang, Yue Hao
Summary: A multifunctional Lewis acid, p-toluenesulfonic acid (TsOH), is used to optimize and tune the properties of single-wall carbon nanotube/silicon (SWCNT/Si) solar cells. TsOH acts as a charge transfer doping agent, optimizing the conductivity and work function of SWCNT films. Additionally, a chemical bridge is formed at the interface of SWCNT/Si heterojunction, effectively suppressing carrier recombination and enhancing the photocurrent. The TsOH coating also functions as an antireflection layer, leading to an increase in the power conversion efficiency.
Review
Crystallography
Haifeng Yang, Hui Wang, Ke Wang, Dongqi Liu, Lifang Zhao, Dazheng Chen, Weidong Zhu, Jincheng Zhang, Chunfu Zhang
Summary: Although the certified power conversion efficiency of organic-inorganic perovskite solar cells has reached 25.7%, their thermal and long-term stability is a major challenge due to volatile organic components. Carbon-based all-inorganic perovskite solar cells have exhibited high stability and low-cost advantages. Many astonishing developments have been achieved in this field.
Article
Materials Science, Multidisciplinary
Kaixuan Sun, Qingrui Wang, Long Zhou, Jingjuan Wang, Jingjing Chang, Rui Guo, Beng Kang Tay, Xiaobing Yan
Summary: Recently, organic-inorganic halide perovskites have made rapid progress in their application in electronic devices, including memristors and artificial synaptic devices. A two-dimensional (2D)-3D organic-inorganic hybrid perovskite memristor was studied in this work, and it showed novel resistance switching characteristics and ultra-low energy consumption. The memristor also functioned well as an artificial synapse, simulating the behavior of calcium ions in biological synapses. This finding highlights the immense application potential of the 2D-3D perovskite memristor in future neuromorphic computing systems.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wenming Chai, Weidong Zhu, Zeyang Zhang, He Xi, Dazheng Chen, Jiaduo Zhu, Jincheng Zhang, Chunfu Zhang, Yue Hao
Summary: This study proposes a novel strategy to enhance the stability and performance of all-inorganic CsPbI3 perovskite solar cells (PSCs) by selectively-localizing growth of two-dimensional (2D) perovskites at grain boundaries. The strategy involves modifying CsPbI3 intermediate films with methylammonium chloride (MACl) and post-treating the CsPbI3 films with phenethylammonium chloride (PEACl). The optimized CsPbI3 PSC demonstrates a remarkable efficiency of 20.55% and exhibits exceptional long-term storage reliability and operational stability, retaining 95% of the initial efficiency after a 500 h test in ambient air.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Shaohua Ma, Weidong Zhu, Tianjiao Han, Chunfu Zhang, Peng Gao, Yonggang Guo, Zhicheng Song, Yufeng Ni, Dayong Qiao
Summary: By using the combined strategies of the Pb(SCN)(2) additive and air annealing, high-quality Cs(0.22)FA(0.78)Pb(I0.85Br0.15)(3) perovskite films with a wide bandgap (1.65-1.80 eV) and favored properties were successfully synthesized. With the desired films, the average efficiencies of semitransparent perovskite solar cells were significantly improved from 18.13% to 20.35%. Furthermore, a milestone efficiency of 30.32% was achieved in a four-terminal perovskite/TOPCon tandem solar cell using the semitransparent perovskite cell due to its excellent performance and preferred optical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Xing Guo, Zhenhua Lin, Wenying Cao, Yumeng Xu, Qingrui Wang, Boyao Zhang, Yue Hao, Jingjing Chang
Summary: TEAPF(6) doping improves the crystal quality and stability of perovskite films, leading to a higher efficiency of perovskite solar cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Xue Zhao, Pengfei Fu, Pan Li, Hainan Du, Jinsong Zhu, Ciyu Ge, Longbo Yang, Boxiang Song, Haodi Wu, Tong Jin, Qingxun Guo, Liang Wang, Jinghui Li, Zewen Xiao, Jingjing Chang, Guangda Niu, Jiajun Luo, Jiang Tang
Summary: Lead halide perovskite nanocrystals have potential as x-ray scintillators, but suffer from toxicity issues and low light yield. Bivalent europium ions (Eu2+) are a prospective replacement for lead due to efficient and self-absorption-free d-f transition. Solution-processed organic-inorganic hybrid halide BA(10)EuI(12) single crystals were demonstrated for the first time, exhibiting high photoluminescence quantum yield, large Stokes shift, and appreciable light yield. BA(10)EuI(12) also showed a short excited-state lifetime, linear scintillation response, low detection limit, and clear x-ray imaging capability.
Review
Chemistry, Multidisciplinary
Xian-Gang Hu, Zhenhua Lin, Liming Ding, Jingjing Chang
Summary: This review comprehensively summarizes the various functions of carbon nanotubes (CNTs) in perovskite solar cells (PSCs) and their applications in flexible and semi-transparent PSCs. The challenges and research interests of using CNTs in high-efficiency and stable perovskite devices are also discussed.
