Abstract: Disclosed is a solar cell including a passivation film formed on a light-receiving surface of a silicon substrate, and an antireflection film formed on the passivation film, wherein the passivation film has a refractive index higher than that of the antireflection film. The passivation film and the antireflection film can each be made of a silicon nitride film.

Abstract: A solar cell containing an electrode, wherein the electrode is formed by firing a conductive paste, wherein the conductive paste includes an organic binder, a solvent, conductive particles, glass frits and a compound containing Al, Ga, In or Tl. A method for producing a solar cell by forming an electrode by firing a conductive paste, wherein the conductive paste includes an organic binder, a solvent, conductive particles, glass frits and a compound containing Al, Ga, In or Tl.

Abstract: A conductive paste for solar cell electrodes with which high FF value can be obtained stably, and a method for producing a solar cell using the same are provided. The conductive paste is a conductive paste for solar cell electrodes which includes an organic binder, a solvent, conductive particles, glass frits, and (A) a substance which changes into a gas at a temperature in the range of 150 to 800° C., and a metal oxide, (B) an organometallic compound and a metal oxide, or (C) a compound containing Al, Ga, In or Tl.

Abstract: Disclosed is a solar cell including a passivation film (2) formed on a light-receiving surface of a silicon substrate (1), and an antireflection film (3) formed on the passivation film (2), wherein the passivation film (2) has a refractive index higher than that of the antireflection film (3). The passivation film (2) and the antireflection film (3) can each be made of a silicon nitride film.

Abstract: A method of providing a user who has installed a solar power generator with appropriate information, including the steps of receiving data of the quantity of generated power and quantity of power draw from a solar power generator connected to a network, calculating the quantity of buy power and quantity of sell power on a time zone basis, reading out a rate table of buy power and sell power, calculating the electric power charge for buy power and sell power classified into contract types, determining the type of contract that is most economical as to the value to be paid to a power company, calculated by subtracting the amount to be received for sell power from the amount to be paid for buy power, and producing appropriate information based on the determined contract type and calculated amount of payment.

Abstract: A method of providing a user who has installed a solar power generator with appropriate information, including the steps of receiving data of the quantity of generated power and quantity of power draw from a solar power generator connected to a network, calculating the quantity of buy power and quantity of sell power on a time zone basis, reading out a rate table of buy power and sell power, calculating the electric power charge for buy power and sell power classified into contract types, determining the type of contract that is most economical as to the value to be paid to a power company, calculated by subtracting the amount to be received for sell power from the amount to be paid for buy power, and producing appropriate information based on the determined contract type and calculated amount of payment.

Abstract: A solar cell comprises a crystalline substrate having projections and depressions formed on either side or both sides of the substrate, wherein a projection-depression depth is 25 .mu.m or more.