SOLAR CELL, MULTI-JUNCTION TYPE SOLAR CELL, SOLAR CELL MODULE AND PHOTOVOLTAIC POWER GENERATION SYSTEM

• Main Authors: YOSHIO SARA, YAMAMOTO KAZUE, NAKAGAWA NAOYUKI, YAMAZAKI MUTSUKI, SHIBAZAKI SOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 02.04.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES; SEMICONDUCTOR DEVICES

To provide solar cell, multi-junction type solar cell, solar cell module and photovoltaic power generation system, capable of achieving high conversion efficiency.SOLUTION: The solar cell includes: a first electrode; a second electrode and a photoelectric conversion layer provided between the first electrode and the second electrode. When a photoluminescence spectrum of the photoelectric conversion layer is measured at a temperature of 100 K or less, a first maximum value (A) which is a maximum value of light emission intensity in a wavelength region of a range of more than 650 nm and 1000 nm or less is 100 times or less (A≤100B) of a second maximum value (B) which is a maximum value of light emission intensity of 600 nm or more and 650 nm or less.SELECTED DRAWING: Figure 1 【課題】実施形態は、変換効率を向上させた太陽電池、多接合型太陽電池、太陽電池モジュール及び太陽光発電システムを提供する。【解決手段】実施形態の太陽電池は、第１電極と、第２電極と、第１電極と第２電極の間に設けられる光電変換層とを備え、光電変換層を100K以下の温度でフォトルミネッセンススペクトルを測定した場合650ｎｍより大きく1000ｎｍ以下の範囲の波長域における発光強度の最高値である第１の最高値（A）が600nm以上650nm以下での発光強度の最高値である第２の最高値（B）の100倍以下（A≦100B）である。【選択図】 図１