An optically addressed spatial light modulator (OASLM) works by using the intensity of a ‘write’ light to modulate the phase of a ‘read’ light. OASLM using ZnO nanoparticles (NPs) as a photoconductor is important to holographic displays because of its record-high spatial resolution. However, its response time to the write light is long and the switch-off time (τ off ) can take tens of seconds due to the trap states in the ZnO NP layer. This results in residual images and poses limitations to its application in dynamic holographic displays. In this work, a ZnO NP photoconductor was replaced by a solution-processed ZnO NP/PEDOT:PSS heterojunction photodiode and the τ off of OASLM was significantly reduced to about 0.6 s. Electrical and optical properties of the heterojunction were characterized and a barrier height of 0.604 eV was determined by CV measurement. The heterojunction-based OASLM was then fabricated and its light modulating performance was investigate...

中文翻译：

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使用基于溶液的ZnO NP / PEDOT：PSS异质结减少透射式光学寻址空间光调制器的响应时间

光学寻址的空间光调制器（OASLM）通过使用“写入”光的强度来调制“读取”光的相位来工作。使用ZnO纳米颗粒（NPs）作为光电导体的OASLM对全息显示非常重要，因为它具有创纪录的空间分辨率。然而，由于其在ZnO NP层中的陷阱状态，其对写光的响应时间很长，并且关闭时间（τoff）可能要花费数十秒。这导致残留图像，并且限制了其在动态全息显示器中的应用。在这项工作中，ZnO NP光电导体被溶液处理的ZnO NP / PEDOT：PSS异质结光电二极管代替，并且OASLM的τoff显着降低至约0.6 s。表征了异质结的电学和光学性质，势垒高度为0。通过CV测量确定604eV。然后制造了基于异质结的OASLM，并研究了其光调制性能。