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夹层聚合物发光电化学电池的动态发射区

发布者::admin   发布时间: :2019-12-03 14:59 浏览次数: :

The Dynamic Emission Zone in Sandwich Polymer Light-Emitting Electrochemical Cells

                                                                                             ——夹层聚合物发光电化学电池的动态发射区

Matthias Diethelm, Andreas Schiller, Maciej Kawecki, Andrius Devižis, Balthasar Blülle, Sandra Jenatsch, Evelyne Knapp, Quirin Grossmann, Beat Ruhstaller, Frank Nüesch, and Roland Hany

Advanced Functional Materials 1906803 (2019)

https://doi.org/10.1002/adfm.201906803

 

Abstract: 

In light-emitting electrochemical cells (LECs), the position of the emission zone (EZ) is not predefined via a multilayer architecture design, but governed by a complex motion of electrical and ionic charges. As a result of the evolution of doped charge transport layers that enclose a dynamic intrinsic region until steady state is reached, the EZ is often dynamic during turn-on. For thick sandwich polymer LECs, a continuous change of the emission color provides a direct visual indication of a moving EZ. Results from an optical and electrical analysis indicate that the intrinsic zone is narrow at early times, but starts to widen during operation, notably well before the electrical device optimum is reached. Results from numerical simulations demonstrate that the only precondition for this event to occur is that the mobilities of anions (ìa) and cations (ìc) are not equal, and the direction of the EZ shift dictates ìc > ìa. Quantitative ion profiles reveal that the displacement of ions stops when the intrinsic zone stabilizes, confirming the relation between ion movement and EZ shift. Finally, simulations indicate that the experimental current peak for constant-voltage operation is intrinsic and the subsequent decay does not result from degradation, as commonly stated.

                                                                                                                      

 

本篇文章采用paios多功能载流子特性分析系统测量和分析数据,paios专用于太阳能电池瞬态光电特性及载流子特性的深入研究与分析;可对OPV太阳能电池、PVK钙钛矿太阳能电池、OLED器件和其他半导体器件中的载流子迁移率进行全面有效的分析和测量

 

测试功能:载流子迁移率      载流子寿命       串联电阻        复合效率      陷阱密度        介电常数      
                      电荷注入势垒      陷阱深度           内建电场        几何电容      掺杂密度        发射寿命      
                      PV光电转化效率(最大功率点Pmax、FF、Voc、IscVS光强)   

 

测试模式:IV曲线,IVL曲线,TPC瞬态光电流,TPV瞬态光电压,Photo-CELIV线性增压载流子抽取,CE载流子抽取,IMPS调制光电流谱,IMVS调制光电压谱,IS阻抗谱,C-V电容-电压,DIT暗注入,EQE外量子效率,TEL瞬态光致发光等;

 

应用领域:无机半导体材料                                                                      有机太阳能电池OPV                    
                      
钙钛矿太阳能电池(Perovskite  Solar  Cell)                   燃料敏化太阳能电池                   
                      
无机太阳能电池(硅基太阳能电池)                               有机半导体材料(OLED)

 

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