Since December 1986, acromiothoracic cutaneous flap (with its blood supply from the cutaneous perforators of deltoid muscular branches of thoracoacromial vessels) has been used for repair of the defects in the oral an...Since December 1986, acromiothoracic cutaneous flap (with its blood supply from the cutaneous perforators of deltoid muscular branches of thoracoacromial vessels) has been used for repair of the defects in the oral and maxillofacial region on 7 cases. All falps in this group survived. This skin flap must be very promising with advantages of an unexposed donor site, soft in texture and color matching the face. Moreover, the operation is less traumatic. The design and essential points of preparing the flap are introduced. The indication of operation is also discussed.展开更多
Understanding the defect characteristics that occur near the space-charge regions(SCRs)of kesterite(CZTSSe)solar cells is important because the recombination loss at the CZTSSe/CdS interface is considered the main cau...Understanding the defect characteristics that occur near the space-charge regions(SCRs)of kesterite(CZTSSe)solar cells is important because the recombination loss at the CZTSSe/CdS interface is considered the main cause of their low efficiency.CZTSSe surfaces with different elemental compositions were formed without polishing(C00)and with polishing for 20 s(C20)and 60 s(C60).For C60,a specific region near the SCR was excessively Cu-rich and Zn-poor compared to C00 and C20.Various charged defects formed where the elemental variation was large.As the main deep acceptor defect energy level(E_(a2))near the SCR increased,the efficiency,open-circuit voltage deficit,and current density degraded,and this phenomenon was especially rapid for large E_(a2) values.As the E_(a2) near the SCR became deep,the carrier diffusion length decreased more for the CZTSSe solar cells with a low carrier mobility than for the CuInGaSe_(2)(CIGSe)solar cells.The large amplitude of the electrostatic potential fluctuation in the CZTSSe solar cells induced a high carrier recombination and a short carrier lifetime.Consequently,the properties of the CZTSSe solar cells were more strongly degraded by defects with deep energy levels near the SCR than those of the CIGSe solar cells.展开更多
文摘Since December 1986, acromiothoracic cutaneous flap (with its blood supply from the cutaneous perforators of deltoid muscular branches of thoracoacromial vessels) has been used for repair of the defects in the oral and maxillofacial region on 7 cases. All falps in this group survived. This skin flap must be very promising with advantages of an unexposed donor site, soft in texture and color matching the face. Moreover, the operation is less traumatic. The design and essential points of preparing the flap are introduced. The indication of operation is also discussed.
基金the National Research Foundation of Korea(NRF)grant funded by the Ministry of Science and ICT(No.2022M3J1A1085371)the DGIST R&D programs of the Ministry of Science and ICT(23-ET-08 and 23-CoE-ET-01)the National Research Foundation of Korea(NRF),funded by the Korean Government(NRF-2021R1A2C1008598).
文摘Understanding the defect characteristics that occur near the space-charge regions(SCRs)of kesterite(CZTSSe)solar cells is important because the recombination loss at the CZTSSe/CdS interface is considered the main cause of their low efficiency.CZTSSe surfaces with different elemental compositions were formed without polishing(C00)and with polishing for 20 s(C20)and 60 s(C60).For C60,a specific region near the SCR was excessively Cu-rich and Zn-poor compared to C00 and C20.Various charged defects formed where the elemental variation was large.As the main deep acceptor defect energy level(E_(a2))near the SCR increased,the efficiency,open-circuit voltage deficit,and current density degraded,and this phenomenon was especially rapid for large E_(a2) values.As the E_(a2) near the SCR became deep,the carrier diffusion length decreased more for the CZTSSe solar cells with a low carrier mobility than for the CuInGaSe_(2)(CIGSe)solar cells.The large amplitude of the electrostatic potential fluctuation in the CZTSSe solar cells induced a high carrier recombination and a short carrier lifetime.Consequently,the properties of the CZTSSe solar cells were more strongly degraded by defects with deep energy levels near the SCR than those of the CIGSe solar cells.
