| dc.description.abstract | The perovskite absorber layer in tin perovskite solar cells(TPSCs) is susceptible decomposition by water, partically due to the hole transoorting layer(HTL) (e.g., PTAA, PEDOT:PSS)was generally doped with hyderophilic salt.Searching for high stability, transpartent inorganic HTL is an important work for advancing TPSCs. Moreover, these may have an interacial problem between inorganic HTLs and perovskite layers. In this study, SnO films were prepared by vacuum thermal evaporation as the hole transport layer, and the valence band of SnO was lowered to -5.33 eV which is close to the valence band of -5.57 eV of the perovskite layer FA0.98EDA0.01SnI3 used in our laboratory after treat with UV-O3 for 20 min, to reduce the energy loss during hole transport. The photovoltaic performance of the device base on SnO HTL is Jsc = 20.99 mA/cm2, Voc = 0.63 V, FF = 52%, and PCE = 6.97%. To solve the interface problem between SnO and perovskite. The amphiphilic polymer PDTON was used as the interface agent. FTIR spectra show the ester C-O stretching and amine C-N stretching shifted to low wavenumbers, when mixed with SnI2 indicating that the lone pair of electrons on the oxygen and amine groups of PDTON can interact with the unsaturated coordinated Sn2+ in tin perovskite. The TRPL data of FA0.98EDA0.01SnI3 deposited in glass or SnO/PDTON showed that the carrier lifetime is 0.97 ns and 0.25 ns, respectively which means that SnO/PDTON can effectively extract the holes of tin perovskite. The photovoltaic parameters of SnO/PDTON based device are Jsc = 23.39 mA/cm2, Voc = 0.59 V, FF = 67%, and PCE = 9.19%. The PV parameters of the PEDOT:PSS based device are Jsc = 24.57 mA/cm2, Voc = 0.53 V, FF = 68%, and PCE = 8.93%. When device used SnO/PDTON HTL was placed in the nitrogen filled glove box without encapsulating and under room light illumination for 3240 hours, 76% of its original efficiency was maintained. While cell based on PEDOT:PSS HTL lost 34% of the initial efficiency. In the atmospheric stability test, when the device was placed in the environment of 27℃ and 40% relative humidity, SnO/PDTON based device maintained 64% of its original efficiency after two hours, whereas PEDOT:PSS based device maintained only 8% of its original efficiency under the same conditions, which demonstrates the stability advantage of inorganic materials as the hole propagation layer. | en_US |