1454686-04-4Relevant articles and documents
Dopant-Free Hole Transport Materials Afford Efficient and Stable Inorganic Perovskite Solar Cells and Modules
Dai, Songyuan,Ding, Bin,Ding, Yong,Dyson, Paul J.,Igci, Cansu,Jankauskas, Vygintas,Kanda, Hiroyuki,Liu, Cheng,Nazeeruddin, Mohammad Khaja,Rakstys, Kasparas,Shibayama, Naoyuki,Syzgantseva, Maria A.,Syzgantseva, Olga A.,Yang, Yi,Zhang, Xianfu
, p. 20489 - 20497 (2021)
The emerging CsPbI3 perovskites are highly efficient and thermally stable materials for wide-band gap perovskite solar cells (PSCs), but the doped hole transport materials (HTMs) accelerate the undesirable phase transition of CsPbI3 in ambient. Herein, a dopant-free D-π-A type HTM named CI-TTIN-2F has been developed which overcomes this problem. The suitable optoelectronic properties and energy-level alignment endow CI-TTIN-2F with excellent charge collection properties. Moreover, CI-TTIN-2F provides multisite defect-healing effects on the defective sites of CsPbI3 surface. Inorganic CsPbI3 PSCs with CI-TTIN-2F HTM feature high efficiencies up to 15.9 %, along with 86 % efficiency retention after 1000 h under ambient conditions. Inorganic perovskite solar modules were also fabricated that exhibiting an efficiency of 11.0 % with a record area of 27 cm2. This work confirms that using efficient dopant-free HTMs is an attractive strategy to stabilize inorganic PSCs for their future scale-up.
Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra-Narrow Band Gap
Yao, Huifeng,Cui, Yong,Yu, Runnan,Gao, Bowei,Zhang, Hao,Hou, Jianhui
, p. 3045 - 3049 (2017)
The design of narrow band gap (NBG) donors or acceptors and their application in organic solar cells (OSCs) are of great importance in the conversion of solar photons to electrons. Limited by the inevitable energy loss from the optical band gap of the photovoltaic material to the open-circuit voltage of the OSC device, the improvement of the power conversion efficiency (PCE) of NBG-based OSCs faces great challenges. A novel acceptor–donor–acceptor structured non-fullerene acceptor is reported with an ultra-narrow band gap of 1.24 eV, which was achieved by an enhanced intramolecular charge transfer (ICT) effect. In the OSC device, despite a low energy loss of 0.509 eV, an impressive short-circuit current density of 25.3 mA cm?2 is still recorded, which is the highest value for all OSC devices. The high 10.9 % PCE of the NBG-based OSC demonstrates that the design and application of ultra-narrow materials have the potential to further improve the PCE of OSC devices.
High-efficiency synthesis method of halogenated 1, 3-indanedione compound
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Paragraph 0028; 0032, (2020/08/09)
The invention relates to the technical field of new material synthesis, in particular to a novel efficient synthesis method of an organic photoelectric intermediate material. The method is characterized in that the synthesis technology is simple, efficient, easy to operate and good in repeatability. The specific synthesis details are as follows: halogenated phthalic acid which is very easy to obtain in industry is used as a raw material, and a corresponding anhydride is obtained after dehydration treatment; different acid anhydrides are reacted with ethyl acetoacetate or tert-butyl acetoacetate at room temperature, and then carboxyl is mildly removed in a hydrochloric acid aqueous solution to obtain the halogenated 1, 3-indanedione compound. Simple and efficient synthesis of the organic intermediates is achieved through the method, synthesis raw materials are easy to obtain, the synthesis process is simple, the path is short, and the synthesis cost is greatly reduced.
