CN106601783A - Oled显示面板及其制备方法、显示装置 - Google Patents
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Abstract
本发明公开了一种OLED显示面板,包括TFT阵列基板,所述TFT阵列基板包括呈阵列排布的多个像素区域和位于所述像素区域之外的非像素区域;所述TFT阵列基板上,对应于每一所述像素区域分别形成有像素结构,对应于所述非像素区域形成有有机薄膜光伏电池。本发明还公开了如上所述OLED显示面板的制备方法,包括:提供一TFT阵列基板并定义出像素区域和非像素区域;采用第一掩膜版,应用薄膜沉积工艺在所述像素区域制备形成像素结构;采用第二掩膜版,应用薄膜沉积工艺在所述像素区域制备形成有机薄膜光伏电池。本发明还公开了包含所述OLED显示面板的显示装置。
Description
技术领域
本发明涉及显示器技术领域,尤其涉及一种OLED显示面板及其制备方法,还涉及包含该OLED显示面板的显示装置。
背景技术
OLED(有机电致发光二极管)显示装置具有自发光、广视角、发光效率高、功耗低、响应时间快、低温特性好、制造工艺简单、成本低等特性。柔性OLED显示装置以其重量轻、可弯曲、便于携带的优点,给可穿戴式设备的应用带来深远的影响,未来柔性OLED显示装置将随着个人智能终端的不断渗透而得到更加广泛的应用。对于可穿戴式设备或者是智能移动终端,由于该类设备的功能日益增多,相应的电池电量的消耗也随之增大,用户将设备的待机时间作为选择产品的一项重要标准,因此,如何提高设备的待机时间是业内一直在寻求解决的难题。
发明内容
鉴于现有技术存在的不足,本发明提供了一种OLED显示面板及其制备方法,该OLED显示面板可以有效地利用环境光发电,辅助提供OLED显示装置待机所需电量,提高了产品的待机时间,提升竞争力。
为了达到上述的目的,本发明采用了如下的技术方案:
一种OLED显示面板,包括TFT阵列基板,其中,所述TFT阵列基板包括呈阵列排布的多个像素区域和位于所述像素区域之外的非像素区域;所述TFT阵列基板上,对应于每一所述像素区域分别形成有像素结构,对应于所述非像素区域形成有有机薄膜光伏电池。
其中,所述有机薄膜光伏电池包括按照远离所述TFT阵列基板的方向依次叠层设置的第一阳极、有机薄膜活性层和第一阴极。
其中,所述第一阳极和所述有机薄膜活性层之间还设置有阳极缓冲层,所述第一阴极和所述有机薄膜活性层之间还设置有阴极修饰层。
其中,所述像素结构包括按照远离所述TFT阵列基板的方向依次叠层设置的第二阳极、空穴传输功能层、发光层、电子传输功能层和第二阴极。
其中,所述空穴传输功能层包括按照远离所述第二阳极的方向依次设置的空穴注入层和空穴传输层,所述电子传输功能层包括按照远离所述第二阴极的方向依次设置的电子注入层和电子传输层。
其中,每一所述像素结构分别对应于红色子像素、绿色子像素或蓝色子像素,所述红色子像素中的发光层为可发出红色光的发光层,所述绿色子像素中的发光层为可发出绿色光的发光层,所述蓝色子像素中的发光层为可发出蓝色光的发光层。
其中,所述TFT阵列基板为柔性的TFT阵列基板。
本发明还提供了如上所述OLED显示面板的制备方法,其包括:提供一TFT阵列基板并定义出像素区域和非像素区域;采用第一掩膜版,应用薄膜沉积工艺在所述像素区域制备形成像素结构;采用第二掩膜版,应用薄膜沉积工艺在所述非像素区域制备形成有机薄膜光伏电池。
其中,所述第二掩膜版的透过区和阻挡区与所述第一掩膜版的透过区和阻挡区是互补结构。
本发明的另一方面是提供一种显示装置,其包括驱动单元和如上所述的OLED显示面板,所述驱动单元向所述OLED显示面板提供驱动信号以使所述OLED显示面板显示画面。
相比于现有技术,本发明实施例提供的OLED显示面板及其制备方法,该OLED显示面板中,在像素结构之外的非像素区域中形成有有机薄膜光伏电池,可以有效地利用环境光发电,辅助提供OLED显示装置待机所需电量,提高了产品的待机时间,提升产品的竞争力。
附图说明
图1是本发明实施例提供的OLED显示面板的俯视结构示意图;
图2是本发明实施例提供的OLED显示面板的剖面结构示意图;
图3是本发明实施例中的TFT阵列基板的结构示意图;
图4是本发明实施例中的位于TFT阵列基板上的像素结构的结构示意图;
图5是本发明实施例中的位于TFT阵列基板上的光伏电池的结构示意图;
图6是本发明实施例提供的OLED显示面板的制备方法的工艺流程图;
图7a和图7b是本发明实施例提供的制备方法的工艺过程的示例性图示;
图8是本发明实施例提供的显示装置的结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚,下面结合附图对本发明的具体实施方式进行详细说明。这些优选实施方式的示例在附图中进行了例示。附图中所示和根据附图描述的本发明的实施方式仅仅是示例性的,并且本发明并不限于这些实施方式。
在此,还需要说明的是,为了避免因不必要的细节而模糊了本发明,在附图中仅仅示出了与根据本发明的方案密切相关的结构和/或处理步骤,而省略了与本发明关系不大的其他细节。
本实施例首先提供了一种OLED显示面板,参阅图1至图3,所述OLED显示面板包括TFT阵列基板1和设置于TFT阵列基板1上的像素结构2和有机薄膜光伏电池(OrganicPhotovoltaics,OPV)3。其中,如图3所示,所述TFT阵列基板1包括呈阵列排布的多个像素区域11和位于所述像素区域11之外的非像素区域12,非像素区域12将相邻的两个像素区域11相互间隔。如图1和图2所示,所述TFT阵列基板1上,对应于每一所述像素区域11分别形成有一个像素结构2,对应于所述非像素区域12形成有有机薄膜光伏电池3。
具体地,如图4所示,所述像素结构2包括按照远离所述TFT阵列基板1的方向依次叠层设置的第二阳极21、空穴传输功能层(Hole Transport Layer,HTL)22、发光层(Emissive Layer,EML)23、电子传输功能层(Electron Transport Layer,ETL)24和第二阴极25。其中,所述空穴传输功能层22包括按照远离所述第二阳极21的方向依次设置的空穴注入层221和空穴传输层222,所述空穴注入层221和空穴传输层222的功能相近,可以统称为空穴传输功能层22;所述电子传输功能层24包括按照远离所述第二阴极25的方向依次设置的电子注入层241和电子传输层242,所述电子注入层241和电子传输层242的功能相近,可以统称为电子传输功能层24。
OLED显示面板的工作原理是在第二阳极21和第二阴极25之间电场的作用下,空穴通过空穴传输功能层22传输到发光层23,电子通过电子传输功能层24传输到发光层23,空穴和电子在发光层23之内复合进而发光。OLED显示面板通常是由R、G、B三原色的混合来实现不同色彩的显示效果,因此OLED显示面板的一个像素通常包含R、G、B三个发光单元,即,如图2所示,每一所述像素结构2分别对应于红色子像素2R、绿色子像素2G或蓝色子像素2B,依次排列的红色子像素2R、绿色子像素2G和蓝色子像素2B构成一个像素单元。其中,所述红色子像素2R中的发光层为可发出红色光的发光层,所述绿色子像素2G中的发光层为可发出绿色光的发光层,所述蓝色子像素2B中的发光层为可发出蓝色光的发光层。通常地,每一个像素单元的R、G、B三个发光单元能够通过驱动电路单独控制,实现每一发光单元的单独驱动。
具体地,如图5所示,所述有机薄膜光伏电池3包括按照远离所述TFT阵列基板1的方向依次叠层设置的第一阳极31、有机薄膜活性层32和第一阴极33。有机薄膜光伏电池的工作原理一般包括以下几个过程:(1)、在环境光(例如太阳光)照射下,能量大于有机半导体材料(活性层)禁带宽度的光子首先被吸收,此时处于HOMO(材料的最高占据轨道)能级的电子会被激发到LUMO(材料的最低空置轨道)能级上,而与之相关联的空穴则占据轨道较低的HOMO能级;(2)、形成的电子-空穴对之间的库仑力较大,它们会以束缚的形式存在,称为激子;(3)、当激子处于电场处或界面处时,在能级差的作用下这些激子就会分离形成自由的电子和空穴,并分别向阴极和阳极运动,形成光电流。进一步地,为了更好地收集光电流,如图5所示,所述第一阳极31和所述有机薄膜活性层32之间还设置有阳极缓冲层34,所述第一阴极33和所述有机薄膜活性层32之间还设置有阴极修饰层35。
所述有机薄膜光伏电池3利用环境光产生的光电流可以连接到OLED显示装置的电源电路中,用于辅助提供OLED显示装置待机所需电量,由此提高了产品的待机时间,提升产品的竞争力。
进一步地,本实施例中,所述TFT阵列基板1采用柔性的TFT阵列基板,由此制备形成可弯曲的柔性OLED显示面板,其可以应用在可穿戴式设备或者是智能移动终端中。
下面介绍如上所述的OLED显示面板的制备方法,如图6所示,该方法包括步骤:
S1、提供一TFT阵列基板1并定义出像素区域11和非像素区域12。
S2、参阅图7a,采用第一掩膜版4,应用薄膜沉积工艺在像素区域11制备形成像素结构2。第一掩膜版4包括透过区41和阻挡区42,采用蒸镀工艺从第一掩膜版4的上方朝向TFT阵列基板1沉积像素结构2各个功能层的材料,各个功能层的材料穿过透过区41沉积在TFT阵列基板1上,最终获得像素结构2。
S3、参阅图7b,采用第二掩膜版5,应用薄膜沉积工艺在非像素区域12制备形成有机薄膜光伏电池3。第二掩膜版5包括透过区51和阻挡区52,采用蒸镀工艺从第二掩膜版5的上方朝向TFT阵列基板1沉积有机薄膜光伏电池3各个功能层的材料,各个功能层的材料穿过透过区51沉积在TFT阵列基板1上,最终获得有机薄膜光伏电池3。具体地,本实施例中,所述第二掩膜版5的透过区51和阻挡区52与所述第一掩膜版4的透过区41和阻挡区42是互补结构,即,所述第二掩膜版5的透过区51对应于所述第一掩膜版4的阻挡区42,而所述第二掩膜版5的阻挡区52则对应于所述第一掩膜版4的透过区41,由此,制备形成在TFT阵列基板1上的像素结构2和有机薄膜光伏电池3是相互不重叠,并且有机薄膜光伏电池3填充了像素结构2之外的所有区域。
本实施例还提供了一种显示装置,如图8所示,所述显示装置包括驱动单元200和显示面板100,所述驱动单元200向所述显示面板100提供驱动信号以使所述显示面板100显示画面。其中,所述显示面板100采用了本发明如上实施例所提供的OLED显示面板。
综上所述,本发明实施例提供的OLED显示面板,在像素结构之外的非像素区域中形成有有机薄膜光伏电池,可以有效地利用环境光发电,辅助提供OLED显示装置待机所需电量,提高了产品的待机时间,提升产品的竞争力。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅是本申请的具体实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本申请的保护范围。
Claims (10)
1.一种OLED显示面板,包括TFT阵列基板,其特征在于,所述TFT阵列基板包括呈阵列排布的多个像素区域和位于所述像素区域之外的非像素区域;所述TFT阵列基板上,对应于每一所述像素区域分别形成有像素结构,对应于所述非像素区域形成有有机薄膜光伏电池。
2.根据权利要求1所述的OLED显示面板,其特征在于,所述有机薄膜光伏电池包括按照远离所述TFT阵列基板的方向依次叠层设置的第一阳极、有机薄膜活性层和第一阴极。
3.根据权利要求2所述的OLED显示面板,其特征在于,所述第一阳极和所述有机薄膜活性层之间还设置有阳极缓冲层,所述第一阴极和所述有机薄膜活性层之间还设置有阴极修饰层。
4.根据权利要求1-3任一所述的OLED显示面板,其特征在于,所述像素结构包括按照远离所述TFT阵列基板的方向依次叠层设置的第二阳极、空穴传输功能层、发光层、电子传输功能层和第二阴极。
5.根据权利要求4所述的OLED显示面板,其特征在于,所述空穴传输功能层包括按照远离所述第二阳极的方向依次设置的空穴注入层和空穴传输层,所述电子传输功能层包括按照远离所述第二阴极的方向依次设置的电子注入层和电子传输层。
6.根据权利要求4所述的OLED显示面板,其特征在于,每一所述像素结构分别对应于红色子像素、绿色子像素或蓝色子像素,所述红色子像素中的发光层为可发出红色光的发光层,所述绿色子像素中的发光层为可发出绿色光的发光层,所述蓝色子像素中的发光层为可发出蓝色光的发光层。
7.根据权利要求1所述的OLED显示面板,其特征在于,所述TFT阵列基板为柔性的TFT阵列基板。
8.一种如权利要求1-7任一所述OLED显示面板的制备方法,其特征在于,包括:
提供一TFT阵列基板并定义出像素区域和非像素区域;
采用第一掩膜版,应用薄膜沉积工艺在所述像素区域制备形成像素结构;
采用第二掩膜版,应用薄膜沉积工艺在所述非像素区域制备形成有机薄膜光伏电池。
9.根据权利要求8所述的OLED显示面板的制备方法,其特征在于,所述第二掩膜版的透过区和阻挡区与所述第一掩膜版的透过区和阻挡区是互补结构。
10.一种显示装置,其特征在于,包括驱动单元和如权利要求1-7任一所述OLED显示面板,所述驱动单元向所述OLED显示面板提供驱动信号以使所述OLED显示面板显示画面。
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