Julian E. Heger

Feb 23, 2024 | nature.com | Junzhi Ye |Aobo Ren |Linjie Dai |Tomi K. Baikie |Renjun Guo |Sebastian Gorgon | +16 more

AbstractPolarized light is critical for a wide range of applications, but is usually generated by filtering unpolarized light, which leads to substantial energy losses and requires additional optics. Here we demonstrate the direct emission of linearly polarized light from light-emitting diodes made of CsPbI3 perovskite nanoplatelet superlattices.

Oct 18, 2023 | pubs.rsc.org | Xinyu yu Jiang |Alexander J. Gillett |Tianle Zheng |Julian E. Heger

Operando study of the influence of small molecule acceptor on the morphology induced device degradation of organic solar cells with different π-π stacking Due to the development of efficient non-fullerene acceptors with excellent crystallinity and effective inter-mixing with donor polymers, the power conversion efficiencies (PCEs) of organic solar cells (OSCs) have reached levels suitable for commercial implementation.

Apr 20, 2023 | dx.doi.org | Kun Sun |Renjun Guo |Yuxin Liang |Julian E. Heger

Perovskite solar cells (PSCs) have achieved competitive power conversion efficiencies compared with established solar cell technologies. However, their operational stability under different external stimuli is limited, and the underlying mechanisms are not fully understood. In particular, an understanding of degradation mechanisms from a morphology perspective during device operation is missing.