ACS Energy Letters

Journal Information
ISSN / EISSN : 2380-8195 / 2380-8195
Published by: American Chemical Society (ACS) (10.1021)
Total articles ≅ 2,441
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Matyas Daboczi, Sinclair R. Ratnasingham, Lokeshwari Mohan, Chenfeng Pu, Iain Hamilton, Yi-Chun Chin, ,
ACS Energy Letters pp 3970-3981; https://doi.org/10.1021/acsenergylett.1c02044

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Baowei Zhang, Valerio Pinchetti, Juliette Zito, Aniruddha Ray, Angela E. M. Melcherts, Michele Ghini, Andrea Pianetti, , , , et al.
ACS Energy Letters pp 3952-3959; https://doi.org/10.1021/acsenergylett.1c01662

Abstract:
We elucidate here the nature of the emissive states in Rb7Sb3Cl16 nanocrystals (NCs) for which we report a synthesis. These NCs have a crystal structure comprising both isolated [SbCl6]3– octahedra and isolated [Sb2Cl10]4– dimers of octahedra. The optical properties of Rb7Sb3Cl16 NCs are compared with those of Sb-doped Rb3InCl6 NCs, the latter containing only isolated [SbCl6]3– octahedra. The remarkably similar behaviors of the two systems indicate that the optical emission in both materials originates from the isolated octahedra. Density functional theory calculations suggest that the [SbCl6]3– octahedra are optically active in emission because the local arrangement of the Rb+ ions around the octahedra limits the elongation of the Sb–Cl bonds upon excitation, helping to confine the self-trapped exciton in them. Conversely, in the [Sb2Cl10]4– dimers the constraining effect of the surrounding Rb+ ions is less marked and the Sb–Cl bonds fully break upon photoexcitation, opening up an efficient nonradiative channel for the self-trapped excitons.
Yanshuai Li, Xiaomei Li, Congcong Du, Haiming Sun, Yin Zhang, Qiunan Liu, Tingting Yang, Jun Zhao, Claude Delmas, Stephen J. Harris, et al.
ACS Energy Letters pp 3960-3969; https://doi.org/10.1021/acsenergylett.1c01976

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Min Li, , Adam R. Pancoast, Lily A. Robertson, , Garvit Agarwal, Hieu A. Doan, Yilin Wang, T. Malsha Suduwella, Sambasiva R. Bheemireddy, et al.
ACS Energy Letters pp 3932-3943; https://doi.org/10.1021/acsenergylett.1c01675

, Bofan Zhao, Indu A. Aravind, Yu Wang, Boxin Zhang, Sizhe Weng, Zhi Cai, Ruoxi Li, Ali Zarei Baygi, , et al.
ACS Energy Letters pp 3924-3930; https://doi.org/10.1021/acsenergylett.1c01666

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, Jiajia Suo, , Selina Olthof, Dmitry Bogachuk, Yeonju Kim, Xiaoxiao Sun, , , Shaik M. Zakeeruddin, et al.
ACS Energy Letters pp 3916-3923; https://doi.org/10.1021/acsenergylett.1c01811

Abstract:
Tremendous efforts have been dedicated toward minimizing the open-circuit voltage deficits on perovskite solar cells (PSCs), and the fill factors are still relatively low. This hinders their further application in large scalable modules. Herein, we employ a newly designed ammonium salt, cyclohexylethylammonium iodide (CEAI), for interfacial engineering between the perovskite and hole-transporting layer (HTL), which enhanced the fill factor to 82.6% and consequent PCE of 23.57% on the target device. This can be associated with a reduction of the trap-assisted recombination rate at the 3D perovskite surface, via formation of a 2D perovskite interlayer. Remarkably, the property of the 2D perovskite interlayer along with the cyclohexylethyl group introduced by CEAI treatment also determines a pronounced enhancement in the surface hydrophobicity, leading to an outstanding stability of over 96% remaining efficiency of the passivated devices under maximum power point tracking with one sun illumination under N2 atmosphere at room temperature after 1500 h.
Yunfei Rao, Jingyuan Dai, Chenxi Sui, Yi-Ting Lai, Zhe Li, Haoming Fang, Xiuqiang Li, Wei Li,
ACS Energy Letters pp 3906-3915; https://doi.org/10.1021/acsenergylett.1c01486

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Panpan Lv, Jin Qian, , Yuwen Wang, Wenwen Wang, , Xin Cheng, Zhenxiang Cheng
ACS Energy Letters pp 3873-3881; https://doi.org/10.1021/acsenergylett.1c02017

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