fig4

Figure 4. (A) Shape recovery behavior of 3D LED device before deformation and after load removal. (Reproduced with permission from Ref.^[157]. Copyright^© 2019. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim); (B) 3D hemispherical MoS2 photodetectors with interconnection. (Reproduced with permission from Ref.^[158]. Copyright^© 2018. Springer Nature); (C) operation of 3D display pixel arrays in a bent state by mechanical deformation. (Reproduced with permission from Ref.^[155]. Copyright^© 2022. Elsevier); (D) 3D architectures of QLED transformed from pre-programmed 2D planar device. (Reproduced with permission from Ref.^[159]. Copyright^© 2021. Springer Nature); (E) 2D and 3D configurations of light emitting system under cooling and heating of liquid crystal elastomer substrate. (Reproduced with permission from Ref.^[160]. Copyright^© 2021. American Chemical Society); (F) freestanding 3D LED with wireless power transmission capability on a leaf. (Reproduced with permission from Ref.^[161]. Copyright^© 2019. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim); (G) strain-insensitive graphene-based photodetection device under stretching and twisting. (Reproduced with permission from Ref.^[156]. Copyright^© 2020. Elsevier).