Gel-incorporated single-crystals provide unique combinational properties of long-range order and composite structures,which is desired for semiconducting and conducting materials.However,the reported gel-incorporated single-crystals are limited to insulating crystals.Here,we examine crystals of two typical semiconductors,lead sulfide(PbS) and lead iodide(Pbl_2),grown from both silica gels and agarose gels.In all the four crystal-gel pairs,single-crystals of the cubic phase of PbS and the hexagonal phase of Pbl_2 were obtained according to the X-ray diffraction analysis.Dissolution of the gel-grown crystals exposed insoluble materials with the shape similar to the original crystals,indicative of gelincorporation inside the crystals.As such,this work creates a facile strategy to construct 3D heterostructures inside semiconducting single-crystals without destroying their long-range order. Gel-incorporated single-crystals provide unique combinational properties of long-range order and composite structures, which is desirable for semiconducting and conducting materials. Host, the reported gel-incorporated single-crystals are limited to insulating crystals. Here, Two typical semiconductors, lead sulfide (PbS) and lead iodide (Pbl_2), grown from both silica gels and agarose gels. All single four crystals-gel pairs, single-crystals of the cubic phase of PbS and the hexagonal phase of Pbl_2 were obtained according to the X-ray diffraction analysis. Dissolution of the gel-grown crystals exposed insoluble materials with the shape similar to the original crystals, indicative of gelin corporation inside the crystals. As such, this work creates a facile strategy to construct 3D heterostructures inside semiconducting single-crystals without destroying their long-range order.