WO2021189523A1 - 一种超柔性透明半导体薄膜及其制备方法 - Google Patents
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Abstract
Description
Claims (20)
- 一种超柔性透明半导体薄膜的制备方法,其中,包括:提供一外延衬底;在所述外延衬底上生长牺牲层;在所述牺牲层上层叠生长至少一层Al 1-nGa nN外延层,其中,0<n≤1;在所述Al 1-nGa nN外延层上生长含有GaN材料的纳米柱阵列;刻蚀所述牺牲层,以将所述牺牲层上的外延结构整体剥离;将剥离后的外延结构转移至柔性透明衬底的表面。
- 根据权利要求1所述的超柔性透明半导体薄膜的制备方法,其中,所述牺牲层上层叠生长有复数层Al 1-nGa nN外延层,相邻的两层Al 1-nGa nN外延层对应的n值不同,所述纳米柱阵列形成于最外层的Al 1-nGa nN外延层上。
- 根据权利要求1所述的超柔性透明半导体薄膜的制备方法,其中,刻蚀所述牺牲层的步骤包括:在Al 1-nGa nN外延层上制备与所述牺牲层导通的电极,然后采用电化学的方式刻蚀所述牺牲层;在采用电化学的方式刻蚀所述牺牲层前,先采用光刻的方式在Al 1-nGa nN外延层上刻蚀出图形,将纳米柱阵列的纳米柱分隔在不同区域的图形中。
- 根据权利要求2所述的超柔性透明半导体薄膜的制备方法,其中,沿外延生长方向,所述牺牲层上的各层Al 1-nGa nN外延层对应的n值大小逐渐减小或者逐渐增大。
- 根据权利要求1所述的超柔性透明半导体薄膜的制备方法,其中,在所述外延衬底上生长牺牲层的步骤前,还在所述外延衬底上生长缓冲层;所述牺牲层和/或所述缓冲层采用一层或多层Al 1-bGa bN材料,其中,0≤b<1,相邻的两层所述Al 1-bGa bN材料对应的b值不同。
- 根据权利要求5所述的超柔性透明半导体薄膜的制备方法,其中,沿外延生长方向,所述外延衬底上的各层所述Al 1-bGa bN材料对应的b值大小逐渐增大。
- 根据权利要求1所述的超柔性透明半导体薄膜的制备方法,其中,所述纳米柱阵列包括自下而上依次层叠生长在所述Al 1-nGa nN外延层上的第一Al 1-mGa mN纳米柱、第二Al 1-xGa xN纳米柱或In 1-xGa xN纳米柱以及第三Al 1-zGa zN纳米柱,其中,0<m≤1,0≤x≤1,0<z≤1。
- 根据权利要求7所述的超柔性透明半导体薄膜的制备方法,其中,所述第一Al 1-mGa mN纳米柱的高度为100nm~1500nm,所述第二Al 1-xGa xN纳米柱或所述In 1-xGa xN纳米柱的高度为20nm~500nm,所述第三Al 1-zGa zN纳米柱的高度为20nm~600nm;和/或,所述纳米柱阵列中的单根纳米柱的直径不超过400nm。
- 根据权利要求7所述的超柔性透明半导体薄膜的制备方法,其中,所述第一Al 1-mGa mN纳米柱包括复数层,相邻的两层第一Al 1-mGa mN纳米柱对应的m值不同;和/或,所述第二Al 1-xGa xN纳米柱或所述In 1-xGa xN纳米柱包括复数层,相邻的两层第二Al 1-xGa xN纳米柱或相邻的两层In 1-xGa xN纳米柱对应的x值不同;和/或,所述第三Al 1-zGa zN纳米柱包括复数层,相邻的两层第三Al 1-zGa zN纳米柱对应的z值不同。
- 根据权利要求9所述的超柔性透明半导体薄膜的制备方法,其中,m值的大小沿第一Al 1-mGa mN纳米柱的生长方向逐渐减小。
- 一种超柔性透明半导体薄膜,其中,根据超柔性透明半导体薄膜的制备方法制成,所述超柔性透明半导体薄膜的制备方法包括:提供一外延衬底;在所述外延衬底上生长牺牲层;在所述牺牲层上层叠生长至少一层Al 1-nGa nN外延层,其中,0<n≤1;在所述Al 1-nGa nN外延层上生长含有GaN材料的纳米柱阵列;刻蚀所述牺牲层,以将所述牺牲层上的外延结构整体剥离;将剥离后的外延结构转移至柔性透明衬底的表面;所述超柔性透明半导体薄膜包括柔性透明衬底和设于所述柔性透明衬底表面的外延结构,所述外延结构包括设于所述柔性透明衬底表面的至少一层Al 1-nGa nN外延层和设于所述Al 1-nGa nN外延层上的含有GaN材料的纳米柱阵列, 其中,0<n≤1。
- 根据权利要求11所述的超柔性透明半导体薄膜,其中,设于所述柔性透明衬底表面的所有Al 1-nGa nN外延层的总厚度H 1满足:1nm≤H 1<800nm。
- 根据权利要求11所述的超柔性透明半导体薄膜,其中,所述牺牲层上层叠生长有复数层Al 1-nGa nN外延层,相邻的两层Al 1-nGa nN外延层对应的n值不同,所述纳米柱阵列形成于最外层的Al 1-nGa nN外延层上。
- 根据权利要求11所述的超柔性透明半导体薄膜,其中,刻蚀所述牺牲层的步骤包括:在Al 1-nGa nN外延层上制备与所述牺牲层导通的电极,然后采用电化学的方式刻蚀所述牺牲层;在采用电化学的方式刻蚀所述牺牲层前,先采用光刻的方式在Al 1-nGa nN外延层上刻蚀出图形,将纳米柱阵列的纳米柱分隔在不同区域的图形中。
- 根据权利要求13所述的超柔性透明半导体薄膜,其中,沿外延生长方向,所述牺牲层上的各层Al 1-nGa nN外延层对应的n值大小逐渐减小或者逐渐增大。
- 根据权利要求11所述的超柔性透明半导体薄膜,其中,在所述外延衬底上生长牺牲层的步骤前,还在所述外延衬底上生长缓冲层;所述牺牲层和/或所述缓冲层采用一层或多层Al 1-bGa bN材料,其中,0≤b<1,相邻的两层所述Al 1-bGa bN材料对应的b值不同;沿外延生长方向,所述外延衬底上的各层所述Al 1-bGa bN材料对应的b值大小逐渐增大。
- 根据权利要求11所述的超柔性透明半导体薄膜,其中,所述纳米柱阵列包括自下而上依次层叠生长在所述Al 1-nGa nN外延层上的第一Al 1-mGa mN纳米柱、第二Al 1-xGa xN纳米柱或In 1-xGa xN纳米柱以及第三Al 1-zGa zN纳米柱,其中,0<m≤1,0≤x≤1,0<z≤1。
- 根据权利要求17所述的超柔性透明半导体薄膜,其中,所述第一Al 1-mGa mN纳米柱的高度为100nm~1500nm,所述第二Al 1-xGa xN纳米柱或所述In 1-xGa xN纳米柱的高度为20nm~500nm,所述第三Al 1-zGa zN纳米柱的高度为20nm~600nm;和/或,所述纳米柱阵列中的单根纳米柱的直径不超过400nm。
- 根据权利要求17所述的超柔性透明半导体薄膜,其中,所述第一Al 1-mGa mN纳米柱包括复数层,相邻的两层第一Al 1-mGa mN纳米柱对应的m值不同;和/或,所述第二Al 1-xGa xN纳米柱或所述In 1-xGa xN纳米柱包括复数层,相邻的两层第二Al 1-xGa xN纳米柱或相邻的两层In 1-xGa xN纳米柱对应的x值不同;和/或,所述第三Al 1-zGa zN纳米柱包括复数层,相邻的两层第三Al 1-zGa zN纳米柱对应的z值不同。
- 根据权利要求19所述的超柔性透明半导体薄膜,其中,m值的大小沿第一Al 1-mGa mN纳米柱的生长方向逐渐减小。
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