![]() ![]() Introducing molecular additives into perovskite precursors has become one of the most effective and prevailing strategies to improve the performance of metal halide perovskite light-emitting diodes (PeLEDs), and recently has boosted the external quantum efficiency (EQE) to high values above ~20% 1, 2, 3, 4, 5, 6, 7. As such, we open new prospects for the rationalized screening of highly effective molecular additives. Our work elucidates the full effects of molecular additives on PeLEDs by uncovering the chelate effect as an important feature within perovskite crystallization. The retarded perovskite nucleation and crystal growth are key to high crystal quality and thus efficient electroluminescence. Specifically, we discover that the chelate effect enhances lead-additive coordination affinity, enabling the formation of thermodynamically stable intermediate phases and inhibiting halide coordination-driven perovskite nucleation. Here, we reveal the largely ignored yet critical role of the chelate effect on governing crystallization dynamics of perovskite emitters and mitigating trap-mediated non-radiative losses. However, a general and puzzling observation that can hardly be rationalized by passivation alone is that most of the molecular additives enabling high-efficiency perovskite light-emitting diodes (PeLEDs) are chelating (multidentate) molecules, while their respective monodentate counterparts receive limited attention. Molecular additives are widely utilized to minimize non-radiative recombination in metal halide perovskite emitters due to their passivation effects from chemical bonds with ionic defects. Nature Communications volume 12, Article number: 4831 ( 2021) The User DSN entries should be re-created automatically.Manipulating crystallization dynamics through chelating molecules for bright perovskite emitters Log on to Microsoft Dynamics SL again, and then try to use the report again. On the System DSN tab, remove any entries for the Microsoft Dynamics SL system database and for the Microsoft Dynamics SL application database. On the User DSN tab, remove any entries for the Microsoft Dynamics SL system database and for the Microsoft Dynamics SL application database. To do this, follow these steps:Ĭlick Start, click Settings, and then click Control Panel. ![]() To resolve this problem, delete the ODBC connections, and let Microsoft Dynamics SL re-create the connections. Then, click to select the check box next to the E7F575915A2E4897A517779C0DD7CE user.įor the Control permission, click to select the Grant check box. In the Select a Page pane, click Permissions.Ĭlick ADD, type MSDSL, and then click OK.įor the Select permission, click to select the Grant check box.Ĭlick Browse. Right-click the custom table or the custom view. Locate the custom table or the custom view in the list. Start Microsoft SQL Server Management Studio.Įxpand Databases, expand the Dynamics SL database, and then expand Tables or Views. Cause Resolution 1Īssign the appropriate rights to the custom table or to the custom view. See Resolution 2 in the "Resolution" section. This connection should be set up to use SQL Server authentication, even if you use Windows Authentication to log on to Microsoft Dynamics SL. When you first run a Crystal Reports report on a new workstation, an ODBC connection is created for the Microsoft Dynamics SL system database and for the Microsoft Dynamics SL application database. ![]() See Resolution 1 in the "Resolution" section.Īn Open Database Connectivity (ODBC) connection is set up incorrectly to use Windows Authentication instead of SQL Server authentication. The Crystal Reports report uses one or more custom tables or custom views.Įither the E7F575915A2E4897A517779C0DD7CE Microsoft SQL Server user or the MSDSL SQL Server application role does not have the required permissions to the custom table or to the custom view. This error occurs because the following conditions are true: Get SQL Query failed Report: C:\Program Files\Microsoft Dynamics SL\Usr_Rpts\03730DET.RPTĬrystal Print Engine Error: 709 - Error in File C:\Program Files\Microsoft Dynamics SL\Usr_Rpts\03730DET.RPT: Crystal Reports Helper Application for Solomon IV
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