The invention relates to a compound, a preparation method, a
hole transport layer material, a photovoltaic device and a photovoltaic module. R1 and R4 are respectively and independently selected from amino and derivatives thereof, hydroxyl and derivatives thereof, methoxyl and derivatives thereof, sulfydryl and derivatives thereof, methylthio and derivatives thereof,
thiophene groups and derivatives thereof,
phosphate groups and derivatives thereof,
carboxylic acid groups and derivatives thereof, and
sulfonic acid groups and derivatives thereof; r2 and R3 are independently selected from
alkyl, a
phosphate group and derivatives thereof, a
carboxylic acid group and derivatives thereof, a
sulfonic acid group and derivatives thereof, and trimethoxysilyl propyl and derivatives thereof. The material is beneficial to improving the
photoelectric conversion efficiency of photovoltaic devices and photovoltaic modules.