Circularly polarized electroluminescence by controlling the emission zone in a twisted mesogenic conjugate polymer

2018 ◽  
Vol 6 (4) ◽  
pp. 726-730 ◽  
Author(s):  
Jin-Hyung Jung ◽  
Dong-Myung Lee ◽  
Jae-Hoon Kim ◽  
Chang-Jae Yu
Keyword(s):  
Theoretical Analysis ◽  
Matrix Method ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Circularly Polarized ◽  
Conjugate Polymer

The measured g factor and the corresponding emission zone were evaluated by theoretical analysis based on the Müller matrix method by increasing the thickness of the hole transport layer (TPBi) in the twisted configuration of conjugate polymer (F8BT).

scholarly journals Degradation mechanism of hybrid tin-based perovskite solar cells and the critical role of tin (IV) iodide

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Luis Lanzetta ◽  
Thomas Webb ◽  
Nourdine Zibouche ◽  
Xinxing Liang ◽  
Dong Ding ◽  
...  
Keyword(s):  
Degradation Mechanism ◽  
Critical Role ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Environmental Stability ◽  
Hole Transport Layer ◽  
Future Design ◽  
Cyclic Degradation ◽  
Stability Issues

AbstractTin perovskites have emerged as promising alternatives to toxic lead perovskites in next-generation photovoltaics, but their poor environmental stability remains an obstacle towards more competitive performances. Therefore, a full understanding of their decomposition processes is needed to address these stability issues. Herein, we elucidate the degradation mechanism of 2D/3D tin perovskite films based on (PEA)0.2(FA)0.8SnI3 (where PEA is phenylethylammonium and FA is formamidinium). We show that SnI4, a product of the oxygen-induced degradation of tin perovskite, quickly evolves into iodine via the combined action of moisture and oxygen. We identify iodine as a highly aggressive species that can further oxidise the perovskite to more SnI4, establishing a cyclic degradation mechanism. Perovskite stability is then observed to strongly depend on the hole transport layer chosen as the substrate, which is exploited to tackle film degradation. These key insights will enable the future design and optimisation of stable tin-based perovskite optoelectronics.

Graded NixAlyO hole transport layer in silicon solar cells

2020 ◽  
Author(s):  
Samed Halilov ◽  
Merid Belayneh ◽  
Md Anower Hossain ◽  
Bram Hoex ◽  
Amir Abdallah ◽  
...  
Keyword(s):  
Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Silicon Solar Cells ◽  
Hole Transport Layer

scholarly journals Improved performance of perovskite light-emitting diodes with a NaCl doped PEDOT:PSS hole transport layer

2021 ◽  
Author(s):  
Xiaokun Huang ◽  
Rainer Bäuerle ◽  
Felix Scherz ◽  
Jean-Nicolas Tisserant ◽  
Wolfgang Kowalsky ◽  
...  
Keyword(s):  
Alkali Halide ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Light Emitting ◽  
Improved Performance

We demonstrate a simple and effective way to enhance the performance of perovskite light-emitting diodes (PeLEDs) by utilizing an alkali halide doped PEDOT:PSS as the hole transport layer (HTL). The...

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