静远嘲风科研图像培训全面开启，针对科研图像爱好者，科研图像从业者均有对应班次。

▲ Vol 18 Issue 05 |  March 07, 2025

Photomechanically accelerated degradation of perovskite solar cells

Haonan Wang, Qing Li, Yan Zhu, Xinyuan Sui, Xiulian Fan, Miaoyu Lin, Yifeng Shi, Yichu Zheng, Haiyang Yuan, Yu Zhou, Haibao Jin, Hua Gui Yang,  Yu Hou and Shuang Yang 

Understanding the origin of intrinsic instability of metal halide perovskites is indispensable for their advancement in opto-electronic applications. Here, we report a photomechanically accelerated degradation mechanism of perovskite thin films, in which the lattice expansion driven by light illumination has been found to govern the degradation kinetics. The dynamic lattice evolution under illumination causes crowding of the perovskite grains, leading to large local strains near the grain boundaries (GBs), which thereby facilitates defect formation and iodine component loss in the region. We show that the physical separation of each perovskite grain using trans-polyisoprene (TPI) could circumvent photomechanical damage at the GBs, achieving a T97 of 1000 h under continuous one-sun illumination at 55 °C in solar cell devices. Our results emphasize the nontrivial role of dynamic lattice deformation in the decomposition of perovskite thin films and open up new possibilities to further improve the intrinsic stability of solar cells.

https://pubs.rsc.org/en/content/articlelanding/2025/ee/d4ee04878d

▲ Vol 21 Issue 12 |  March 26, 2025

Dynamically Tunable Chiroptical Activities of Flexible Chiral Plasmonic Film via Surface Buckling

Yisheng He, Xiao Meng, Zhili Shen, Bowen Jin, Xinyi Chen, Bin Ai, Kun Liu, Chunhong Ye

Plasmonic Films

A flexible chiral plasmonic film composed of asymmetrical 3D “S-liked” assembly of plasmonic nanoparticles is achieved, facilitated by mechanically induced surface wrinkling of the elastic polymeric substrate. The structure exhibits a strong circular dichroism (CD) response up to 2.5 degrees and a g-factor of 0.11in NIR region, along with dynamically modulated CD properties, including switchable CD handedness and tunable intensity. More in article number 2407635, Kun Liu, Chunhong Ye, and co-workers.

https://onlinelibrary.wiley.com/doi/10.1002/smll.202570093

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静远嘲风（MY Scimage） 成立于2007年，嘲风取自中国传统文化中龙生九子，子子不同的传说，嘲风为守护屋脊之瑞兽，喜登高望远；静远取自成语“宁静致远”，登高莫忘初心，远观而不可务远。

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