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Chen Qi & Zhou Huanping, Science: Breakthrough! Over 24% Efficiency! Highly Reproducible and Durable Perovskite Solar Cells
Solution processing of semiconductors holds great promise for the high-throughput production of cost-effective electronic and optoelectronic devices. Although hybrid perovskites demonstrate significant potential in a wide range of device applications, challenges remain in developing high-quality materials that simultaneously enhance process reproducibility and scalability. Qi Chen of Beijing Institute of Technology and Huanping Zhou of Peking University have reported a liquid-medium annealing (LMA) technique that establishes a robust chemical environment and a uniform heating field to regulate crystal growth across the entire thin film.
2021
07-30
Chen Qi, Joule: 23.9% Efficiency! Dual Back-Contact Interface Layer for High-Efficiency and Stable Perovskite Solar Cells
As perovskite solar cells (PSCs) move toward practical applications, both high efficiency and long-term stability are essential, with the interfaces playing a crucial role. Researchers led by Qi Chen at Beijing Institute of Technology have developed interface layers and electrode buffer layers tailored for the hole-transport layer (HTL), achieving a dual rear-field (SEB) architecture at the two relevant interfaces.
07-12
Chen Jiangzhao et al.: 16.75% Efficiency! Methylammonium-Free Two-Dimensional DJ-Phase Perovskite Solar Cells
Recently, the research team led by Researcher Chen Jiangzhao from the School of Optoelectronic Engineering at Chongqing University published an article titled “Interfacial gradient energy band alignment modulation via ion exchange reaction toward efficient and stable methylammonium-free Dion-Ja” in the internationally renowned academic journal Journal of Power Sources (a TOP-tier journal).
07-06
Zhang Xiaodan, ACS Energy Letters: Record-breaking! Perovskite solar cell with 23.8% efficiency
SnO2 is widely used as the electron-transport layer in perovskite solar cells; however, SnO2 thin films typically contain a large number of detrimental defect states and exhibit poor band alignment with the perovskite material, leading to losses in the open-circuit voltage of the device. Researchers at Nankai University, including Xiaodan Zhang, have reported that incorporating CoCl2·6H2O into the SnO2 film can effectively enhance band alignment and improve charge extraction, thereby boosting the overall performance of the solar cell.
05-18
Cai Zhihao et al. AM: Over 10% Efficiency! Highly Stable Blue Perovskite Light-Emitting Diodes
Although numerous studies have been conducted to tune the quasi-2D perovskite composition in perovskite light-emitting diodes (PeLEDs) to enhance their electroluminescence, few reports have addressed strategies for enhancing energy transfer among the quasi-2D perovskite layers in the thin film—a critical factor for achieving high-performance PeLEDs.
2020
11-24
Lu Xinhui & Fang Guojia Matter: GIWAXS Reveals the Influence of Halogens on Crystallization and Phase Evolution in Inorganic Perovskite Thin Films
All-inorganic perovskite solar cells (PSCs) have garnered increasing attention due to their outstanding thermal stability, which is attributed to their potentially superior thermal robustness. However, the film-forming processes and phase-transition mechanisms of CsPbX3 thin films with different halide compositions (I, Br, Cl) remain poorly understood. Moreover, there is currently no consensus on the role of halide elements in the phase transitions and crystal-growth kinetics of all-inorganic perovskites. Researchers led by Xin-Hui Lu at the Chinese University of Hong Kong and Guo-Jia Fang at Wuhan University have employed state-of-the-art in situ grazing-incidence wide-angle X-ray scattering to investigate the real-time crystalline and phase evolution of all-inorganic perovskite thin films.
11-16
Dr. Pradhan: Synthesis, Optical Properties, and Applications of Perovskite Nanocrystal Heterostructures
Heterostructures often exhibit synergistic effects that exceed the sum of their individual components. Currently, heterostructures involving metal nanoparticles and chalcogenide semiconductor nanocrystals have been extensively studied; however, research on heterostructures based on perovskite nanocrystals, which have experienced explosive growth in recent years, remains relatively limited. A primary reason for this is the extremely low formation energy of perovskite nanocrystals and their remarkably rapid growth kinetics, which pose significant challenges to the synthesis of well-defined heterostructures.
10-09
The purest 520! We’re giving you perovskite QLED with the highest EQE efficiency!
Owing to their exceptional color purity, perovskite quantum-dot–based light-emitting diodes (QLEDs) hold great promise for future solid-state lighting and high-definition displays. However, charge imbalance during device operation can lead to charge accumulation, which in turn causes luminescence quenching and severely degrades device performance. Researchers led by Song Jizhong at Nanjing University of Science and Technology have reported a green-light perovskite QLED that exhibits both high color purity and high efficiency and stability.
09-23
OLED Classic Training Materials
Introduction to OLED Display Technology OLED (Organic Light-Emitting Diode), also known as organic electroluminescent display or organic light-emitting semiconductor, is the English abbreviation for organic light-emitting diode. It is a device that generates electroluminescence through a multilayer organic thin-film structure. Its ease of fabrication and low driving voltage make OLED particularly well-suited for flat-panel display applications. Compared with LCDs, OLED displays are lighter and thinner, offer higher brightness, lower power consumption, faster response times, superior image clarity, greater flexibility, and higher luminous efficiency.
09-12
Peng Qiang and Yan He’s EES: 17.33% Efficiency! High-Efficiency Non-Fullerene Organic Solar Cells
Over the past several decades, organic photovoltaics (OPV) have attracted considerable research attention. The recent emergence of polymer solar cells based on non-fullerene acceptors has significantly advanced the field of OPV. However, high-performance polymer solar cells to date are typically fabricated using halogenated solvents. These halogenated solvents pose risks to human health and the environment and are therefore unsuitable for industrial applications. Moreover, due to the limited solubility of non-halogenated solvents, it is challenging to achieve the desired morphological control, which in turn hinders their adoption in practical applications.
09-02
