The Research On Perovskite/Organic Small Molecule Compound Solar Cell Materials And Devices

Perovskite solar-energy battery that mixed organic and inorganic materials together is developping rapidly. Just in a short time, its transferring effiency has achieved 20%, which even show great advantages in tecnology and imput. Hole transport materials(HTM) is the base of materials for cell, the absorption spectrum and abilities to catching photons are fundemental factors to evaluate a device. Geneerally, it is giganticly meaningful to design and synthesize wel-equipped HTM for enhancing the ability of perovskite solar-energy battery as well as its transferring effiency.In order to design and synthesis the more excellent hole-transporting materials. In this article,we designed and synthesized compounds ATA,ATTA, BATA and BATTA. The structure is similar to 9,9’-Spirobifluorene, anthracene as the center, the methoxyl diphenylamine and methoxyl tiphenylamine as end. So we are respectively structural characteristics and photovoltaic performance characterization with research, the main contents as follows:In chapter two, Perovskite solar-energy battery device that owns the structure of ITO/ PEDOT:PSS/HTM/Perovskite/PC61BM/Ca/Al is made by ATA&ATTA, whose band gap are2.18 eV and 2.58 eV respectively. The HOMO of ATA is-5.10 eV, as-5.12 eV to ATTA. The LUMO of ATA is-2.67 eV,as-2.48 eV to ATTA.The devices are tested by ATA&ATTA that have a variety of thickness,then it is 2000 r 40s that is the best thickness. With the measurement of simulator[condition: AM 1.5 G(100 mW/cm2)],the transferring effiency of ATA is 7.04%, its open-circuit voltage is 0.85 V, its short-circuit current is 12.02 mA cm-2, its fill factor is 69%, while these datas for ATTA is 5.98%, 0.84 V, 10.75 mA cm-2, 66% corresponding.In chapter three, experiments are done in the same testing environment. The band gap of BATA and BATTA are 2.30 eV and 2.64 eV respectively. The HOMO of BATA is-5.08 eV, as-5.20 eV to BATTA. The LUMO of BATA is-2.78 eV, as-2.56 eV to BATTA.The devices are tested by BATA&BATTA that have a variety of thickness,then it is 2000 r 40s and 1500 r 40s that are their best thickness.With the measurement of simulator[condition: AM 1.5G(100 mW/cm2)], the transferring effiency of ATA is 8.24%, its open-circuit voltage is 0.89 V,its short-circuit current is 14.28 mA cm-2, its fill factor is 64%, while these datas for ATTA is 5.12%, 0.87 V, 9.22 mA cm-2, 63% corresponding.In chapter four, I synthesize DTBDT On the basis of DTBDT and BT, We manage to obtain PDTBDT-BT&PDTBDT-FBT.Via producing ITO/PFN(10 nm) /PDTBDT-BT:PC71BM / MoO3(10 nm)/ Ag and ITO/PFN(10 nm) /PDTBDT-FBT:PC71BM / MoO3(10 nm)/ Ag, We make such adevice whose active layer has 1/3 polysters and 2/3 PC71 BM in weight, With the measurement of simulator[condition: AM 1.5G(100 mW/cm2)]. With the thickness of PDTBDT-BT:PC71BM(1:2)is 220 nm, the transferring effiency of the device is 8.54%, its open-circuit voltage is 0.81 V, its short-circuit current is 15.2 mA cm-2, its fill factor is 69.2%,while these datas turn to 5.98%,0.84 V,10.75 mA cm-2,66% corresponding when the thickness of PDTBDT-BT:PC71BM(1:2)becomes 210 nm.