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Stable Light‐Emitting Diodes Using Phase‐Pure Ruddlesden–Popper Layered Perovskites
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-03 , DOI: 10.1002/adma.201704217 Hsinhan Tsai 1, 2 , Wanyi Nie 1 , Jean-Christophe Blancon 1 , Constantinos C. Stoumpos 3 , Chan Myae Myae Soe 3 , Jinkyoung Yoo 4 , Jared Crochet 5 , Sergei Tretiak 4 , Jacky Even 6 , Aditya Sadhanala 7 , Giovanni Azzellino 8 , Roberto Brenes 8 , Pulickel M. Ajayan 2 , Vladimir Bulović 8 , Samuel D. Stranks 7, 8 , Richard H. Friend 7 , Mercouri G. Kanatzidis 3 , Aditya D. Mohite 1
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-03 , DOI: 10.1002/adma.201704217 Hsinhan Tsai 1, 2 , Wanyi Nie 1 , Jean-Christophe Blancon 1 , Constantinos C. Stoumpos 3 , Chan Myae Myae Soe 3 , Jinkyoung Yoo 4 , Jared Crochet 5 , Sergei Tretiak 4 , Jacky Even 6 , Aditya Sadhanala 7 , Giovanni Azzellino 8 , Roberto Brenes 8 , Pulickel M. Ajayan 2 , Vladimir Bulović 8 , Samuel D. Stranks 7, 8 , Richard H. Friend 7 , Mercouri G. Kanatzidis 3 , Aditya D. Mohite 1
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State‐of‐the‐art light‐emitting diodes (LEDs) are made from high‐purity alloys of III–V semiconductors, but high fabrication cost has limited their widespread use for large area solid‐state lighting. Here, efficient and stable LEDs processed from solution with tunable color enabled by using phase‐pure 2D Ruddlesden–Popper (RP) halide perovskites with a formula (CH3(CH2)3NH3)2(CH3NH3)n−1PbnI3n+1 are reported. By using vertically oriented thin films that facilitate efficient charge injection and transport, efficient electroluminescence with a radiance of 35 W Sr−1 cm−2 at 744 nm with an ultralow turn‐on voltage of 1 V is obtained. Finally, operational stability tests suggest that phase purity is strongly correlated to stability. Phase‐pure 2D perovskites exhibit >14 h of stable operation at peak operating conditions with no droop at current densities of several Amperes cm−2 in comparison to mixtures of 2D/3D or 3D perovskites, which degrade within minutes.
中文翻译：
使用相纯Ruddlesden-Pop层状钙钛矿制成的稳定发光二极管
最先进的发光二极管（LED）由III-V半导体的高纯度合金制成，但是高昂的制造成本限制了它们在大面积固态照明中的广泛使用。这里，从具有可调谐色溶液处理的有效和稳定的LED能够通过使用相纯2D Ruddlesden-波普（RP）卤化物钙钛矿具有式（CH 3（CH 2）3 NH 3）2（CH 3 NH 3）ñ - 1 Pb n I 3 n +1被报道。通过使用有助于有效电荷注入和传输的垂直取向薄膜，可以获得有效的电致发光，其在744 nm处的辐射强度为35 W Sr -1 cm -2，具有1 V的超低开启电压。最后，操作稳定性测试表明，相纯度与稳定性密切相关。与2D / 3D或3D钙钛矿的混合物相比，在2A / 3D或3D钙钛矿的混合物中，纯相2D钙钛矿在峰值工作条件下可稳定运行超过14小时，在几安培cm -2的电流密度下不会下垂。
更新日期：2018-01-03
中文翻译：
使用相纯Ruddlesden-Pop层状钙钛矿制成的稳定发光二极管
最先进的发光二极管（LED）由III-V半导体的高纯度合金制成，但是高昂的制造成本限制了它们在大面积固态照明中的广泛使用。这里，从具有可调谐色溶液处理的有效和稳定的LED能够通过使用相纯2D Ruddlesden-波普（RP）卤化物钙钛矿具有式（CH 3（CH 2）3 NH 3）2（CH 3 NH 3）ñ - 1 Pb n I 3 n +1被报道。通过使用有助于有效电荷注入和传输的垂直取向薄膜，可以获得有效的电致发光，其在744 nm处的辐射强度为35 W Sr -1 cm -2，具有1 V的超低开启电压。最后，操作稳定性测试表明，相纯度与稳定性密切相关。与2D / 3D或3D钙钛矿的混合物相比，在2A / 3D或3D钙钛矿的混合物中，纯相2D钙钛矿在峰值工作条件下可稳定运行超过14小时，在几安培cm -2的电流密度下不会下垂。
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